31669056 has 140 divisors (see below), whose sum is σ = 96812100. Its totient is φ = 10229760.

The previous prime is 31669051. The next prime is 31669061. The reversal of 31669056 is 65096613.

It is an interprime number because it is at equal distance from previous prime (31669051) and next prime (31669061).

It can be written as a sum of positive squares in 2 ways, for example, as 2509056 + 29160000 = 1584^2 + 5400^2 .

It is a super-2 number, since 2×31669056² = 2005858215862272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 31669056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31669051) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 212470 + ... + 212618.

It is an arithmetic number, because the mean of its divisors is an integer number (691515).

Almost surely, 2^31669056 is an apocalyptic number.

31669056 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31669056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48406050).

31669056 is an abundant number, since it is smaller than the sum of its proper divisors (65143044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31669056 is a wasteful number, since it uses less digits than its factorization.

31669056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 31669056 is about 5627.5266325447. The cubic root of 31669056 is about 316.3819554844.

The spelling of 31669056 in words is "thirty-one million, six hundred sixty-nine thousand, fifty-six".