31001213152 has 48 divisors (see below), whose sum is σ = 75118331232. Its totient is φ = 12264215040.

The previous prime is 31001213137. The next prime is 31001213183. The reversal of 31001213152 is 25131210013.

It is a super-2 number, since 2×31001213152² (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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5320099 + ... + 5325922.

It is an arithmetic number, because the mean of its divisors is an integer number (1564965234).

Almost surely, 2^31001213152 is an apocalyptic number.

31001213152 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31001213152 is an abundant number, since it is smaller than the sum of its proper divisors (44117118080).

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

31001213152 is a wasteful number, since it uses less digits than its factorization.

31001213152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646051 (or 10646043 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 31001213152 its reverse (25131210013), we get a palindrome (56132423165).

The spelling of 31001213152 in words is "thirty-one billion, one million, two hundred thirteen thousand, one hundred fifty-two".