31540452 has 24 divisors (see below), whose sum is σ = 76794816. Its totient is φ = 10056288.

The previous prime is 31540441. The next prime is 31540471. The reversal of 31540452 is 25404513.

It is a super-2 number, since 2×31540452² = 1989600224728608, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56863 + ... + 57414.

It is an arithmetic number, because the mean of its divisors is an integer number (3199784).

Almost surely, 2^31540452 is an apocalyptic number.

It is an amenable number.

31540452 is an abundant number, since it is smaller than the sum of its proper divisors (45254364).

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

31540452 is a wasteful number, since it uses less digits than its factorization.

31540452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114307 (or 114305 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 31540452 is about 5616.0886745136. The cubic root of 31540452 is about 315.9531122014.

Adding to 31540452 its reverse (25404513), we get a palindrome (56944965).

The spelling of 31540452 in words is "thirty-one million, five hundred forty thousand, four hundred fifty-two".