31970224 has 80 divisors (see below), whose sum is σ = 74057760. Its totient is φ = 13178880.

The previous prime is 31970221. The next prime is 31970231. The reversal of 31970224 is 42207913.

It is a super-2 number, since 2×31970224² = 2044190445220352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31970192 and 31970201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31970221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203554 + ... + 203710.

It is an arithmetic number, because the mean of its divisors is an integer number (925722).

Almost surely, 2^31970224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31970224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37028880).

31970224 is an abundant number, since it is smaller than the sum of its proper divisors (42087536).

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

31970224 is a wasteful number, since it uses less digits than its factorization.

31970224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 31970224 is about 5654.2217855334. The cubic root of 31970224 is about 317.3817080566.

The spelling of 31970224 in words is "thirty-one million, nine hundred seventy thousand, two hundred twenty-four".