31000252 has 12 divisors (see below), whose sum is σ = 55170360. Its totient is φ = 15237296.

The previous prime is 31000243. The next prime is 31000259. The reversal of 31000252 is 25200013.

It is a super-2 number, since 2×31000252² = 1922031248127008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000259) 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 3 ways as a sum of consecutive naturals, for example, 65443 + ... + 65914.

It is an arithmetic number, because the mean of its divisors is an integer number (4597530).

Almost surely, 2^31000252 is an apocalyptic number.

It is an amenable number.

31000252 is a deficient number, since it is larger than the sum of its proper divisors (24170108).

31000252 is a wasteful number, since it uses less digits than its factorization.

31000252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131420 (or 131418 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 31000252 is about 5567.7869930521. The cubic root of 31000252 is about 314.1389164497.

Adding to 31000252 its reverse (25200013), we get a palindrome (56200265).

The spelling of 31000252 in words is "thirty-one million, two hundred fifty-two", and thus it is an aban number.