31109252 has 24 divisors (see below), whose sum is σ = 58383360. Its totient is φ = 14451840.

The previous prime is 31109249. The next prime is 31109291. The reversal of 31109252 is 25290113.

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, 2477 + ... + 8267.

It is an arithmetic number, because the mean of its divisors is an integer number (2432640).

Almost surely, 2^31109252 is an apocalyptic number.

It is an amenable number.

31109252 is a deficient number, since it is larger than the sum of its proper divisors (27274108).

31109252 is a wasteful number, since it uses less digits than its factorization.

31109252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5891 (or 5889 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 31109252 is about 5577.5668530283. The cubic root of 31109252 is about 314.5066670982.

Adding to 31109252 its reverse (25290113), we get a palindrome (56399365).

The spelling of 31109252 in words is "thirty-one million, one hundred nine thousand, two hundred fifty-two".