31169142 has 48 divisors (see below), whose sum is σ = 70930080. Its totient is φ = 9890160.

The previous prime is 31169111. The next prime is 31169147. The reversal of 31169142 is 24196113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31169147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 438967 + ... + 439037.

It is an arithmetic number, because the mean of its divisors is an integer number (1477710).

Almost surely, 2^31169142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31169142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35465040).

31169142 is an abundant number, since it is smaller than the sum of its proper divisors (39760938).

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

31169142 is an equidigital number, since it uses as much as digits as its factorization.

31169142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 105 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 31169142 is about 5582.9331000828. The cubic root of 31169142 is about 314.7083619718.

The spelling of 31169142 in words is "thirty-one million, one hundred sixty-nine thousand, one hundred forty-two".