31520023214 has 8 divisors (see below), whose sum is σ = 48433206528. Its totient is φ = 15375621040.

The previous prime is 31520023189. The next prime is 31520023231. The reversal of 31520023214 is 41232002513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31520023214² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31520023214.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192195182 + ... + 192195345.

It is an arithmetic number, because the mean of its divisors is an integer number (6054150816).

Almost surely, 2^31520023214 is an apocalyptic number.

31520023214 is a deficient number, since it is larger than the sum of its proper divisors (16913183314).

31520023214 is a wasteful number, since it uses less digits than its factorization.

31520023214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384390570.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 31520023214 its reverse (41232002513), we get a palindrome (72752025727).

The spelling of 31520023214 in words is "thirty-one billion, five hundred twenty million, twenty-three thousand, two hundred fourteen".