31243372 has 24 divisors (see below), whose sum is σ = 57839040. Its totient is φ = 14726160.

The previous prime is 31243367. The next prime is 31243379. The reversal of 31243372 is 27334213.

It is a super-2 number, since 2×31243372² = 1952296587860768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31243379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16347 + ... + 18157.

It is an arithmetic number, because the mean of its divisors is an integer number (2409960).

Almost surely, 2^31243372 is an apocalyptic number.

It is an amenable number.

31243372 is a deficient number, since it is larger than the sum of its proper divisors (26595668).

31243372 is a wasteful number, since it uses less digits than its factorization.

31243372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061 (or 2059 counting only the distinct ones).

The product of its digits is 3024, while the sum is 25.

The square root of 31243372 is about 5589.5770859699. The cubic root of 31243372 is about 314.9579922146.

Adding to 31243372 its reverse (27334213), we get a palindrome (58577585).

The spelling of 31243372 in words is "thirty-one million, two hundred forty-three thousand, three hundred seventy-two".