31235453212 has 6 divisors (see below), whose sum is σ = 54662043128. Its totient is φ = 15617726604.

The previous prime is 31235453191. The next prime is 31235453257. The reversal of 31235453212 is 21235453213.

It is a super-2 number, since 2×31235453212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3904431648 + ... + 3904431655.

Almost surely, 2^31235453212 is an apocalyptic number.

It is an amenable number.

31235453212 is a deficient number, since it is larger than the sum of its proper divisors (23426589916).

31235453212 is a wasteful number, since it uses less digits than its factorization.

31235453212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808863307 (or 7808863305 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

Subtracting from 31235453212 its reverse (21235453213), we obtain a palindrome (9999999999).

The spelling of 31235453212 in words is "thirty-one billion, two hundred thirty-five million, four hundred fifty-three thousand, two hundred twelve".