31142952 has 48 divisors (see below), whose sum is σ = 86149440. Its totient is φ = 10159008.

The previous prime is 31142939. The next prime is 31142953. The reversal of 31142952 is 25924113.

It is not an unprimeable number, because it can be changed into a prime (31142953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1218 + ... + 7985.

It is an arithmetic number, because the mean of its divisors is an integer number (1794780).

Almost surely, 2^31142952 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 31142952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43074720).

31142952 is an abundant number, since it is smaller than the sum of its proper divisors (55006488).

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

31142952 is a wasteful number, since it uses less digits than its factorization.

31142952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9262 (or 9255 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 31142952 is about 5580.5870658919. The cubic root of 31142952 is about 314.6201922729.

The spelling of 31142952 in words is "thirty-one million, one hundred forty-two thousand, nine hundred fifty-two".