31400235252 has 24 divisors (see below), whose sum is σ = 81408017600. Its totient is φ = 10466745048.

The previous prime is 31400235241. The next prime is 31400235323. The reversal of 31400235252 is 25253200413.

It is a happy number.

31400235252 is a `hidden beast` number, since 3 + 1 + 400 + 2 + 3 + 5 + 252 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145371352 + ... + 145371567.

Almost surely, 2^31400235252 is an apocalyptic number.

It is an amenable number.

31400235252 is an abundant number, since it is smaller than the sum of its proper divisors (50007782348).

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

31400235252 is a wasteful number, since it uses less digits than its factorization.

31400235252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290742932 (or 290742924 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 31400235252 its reverse (25253200413), we get a palindrome (56653435665).

The spelling of 31400235252 in words is "thirty-one billion, four hundred million, two hundred thirty-five thousand, two hundred fifty-two".