31232213000 has 64 divisors (see below), whose sum is σ = 77382442800. Its totient is φ = 11758003200.

The previous prime is 31232212993. The next prime is 31232213021. The reversal of 31232213000 is 31223213.

It can be written as a sum of positive squares in 8 ways, for example, as 1400705476 + 29831507524 = 37426^2 + 172718^2 .

It is a super-2 number, since 2×31232213000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 31232213000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 901595 + ... + 935594.

Almost surely, 2^31232213000 is an apocalyptic number.

It is an amenable number.

31232213000 is an abundant number, since it is smaller than the sum of its proper divisors (46150229800).

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

31232213000 is a wasteful number, since it uses less digits than its factorization.

31232213000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837227 (or 1837213 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31232213000 its reverse (31223213), we get a palindrome (31263436213).

The spelling of 31232213000 in words is "thirty-one billion, two hundred thirty-two million, two hundred thirteen thousand".