31970052 has 72 divisors (see below), whose sum is σ = 86591232. Its totient is φ = 10303200.

The previous prime is 31970051. The next prime is 31970063. The reversal of 31970052 is 25007913.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31969998 and 31970025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31970051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29602 + ... + 30662.

It is an arithmetic number, because the mean of its divisors is an integer number (1202656).

Almost surely, 2^31970052 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 31970052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43295616).

31970052 is an abundant number, since it is smaller than the sum of its proper divisors (54621180).

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

31970052 is a wasteful number, since it uses less digits than its factorization.

31970052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 31970052 is about 5654.2065756391. The cubic root of 31970052 is about 317.3811388837.

Adding to 31970052 its reverse (25007913), we get a palindrome (56977965).

The spelling of 31970052 in words is "thirty-one million, nine hundred seventy thousand, fifty-two".