31244140252 has 24 divisors (see below), whose sum is σ = 60782648192. Its totient is φ = 13955198400.

The previous prime is 31244140231. The next prime is 31244140253. The reversal of 31244140252 is 25204144213.

It is a self number, because there is not a number n which added to its sum of digits gives 31244140252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31244140253) 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, 9689499 + ... + 9692722.

Almost surely, 2^31244140252 is an apocalyptic number.

It is an amenable number.

31244140252 is a deficient number, since it is larger than the sum of its proper divisors (29538507940).

31244140252 is a wasteful number, since it uses less digits than its factorization.

31244140252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19382269 (or 19382267 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 31244140252 its reverse (25204144213), we get a palindrome (56448284465).

The spelling of 31244140252 in words is "thirty-one billion, two hundred forty-four million, one hundred forty thousand, two hundred fifty-two".