31263103172 has 12 divisors (see below), whose sum is σ = 62526206400. Its totient is φ = 13398472776.

The previous prime is 31263103147. The next prime is 31263103181. The reversal of 31263103172 is 27130136213.

31263103172 is an admirable number.

It is a super-3 number, since 3×31263103172³ (a number of 32 digits) contains 333 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 558269672 + ... + 558269727.

It is an arithmetic number, because the mean of its divisors is an integer number (5210517200).

Almost surely, 2^31263103172 is an apocalyptic number.

It is an amenable number.

31263103172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31263103172 is a wasteful number, since it uses less digits than its factorization.

31263103172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116539410 (or 1116539408 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

Adding to 31263103172 its reverse (27130136213), we get a palindrome (58393239385).

The spelling of 31263103172 in words is "thirty-one billion, two hundred sixty-three million, one hundred three thousand, one hundred seventy-two".