31870720268 has 6 divisors (see below), whose sum is σ = 55773760476. Its totient is φ = 15935360132.

The previous prime is 31870720249. The next prime is 31870720283. The reversal of 31870720268 is 86202707813.

It is a happy number.

It is a super-2 number, since 2×31870720268² (a number of 22 digits) contains 22 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 as a sum of consecutive naturals, namely, 3983840030 + ... + 3983840037.

It is an arithmetic number, because the mean of its divisors is an integer number (9295626746).

Almost surely, 2^31870720268 is an apocalyptic number.

It is an amenable number.

31870720268 is a deficient number, since it is larger than the sum of its proper divisors (23903040208).

31870720268 is a wasteful number, since it uses less digits than its factorization.

31870720268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7967680071 (or 7967680069 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 31870720268 in words is "thirty-one billion, eight hundred seventy million, seven hundred twenty thousand, two hundred sixty-eight".