31428876501 has 30 divisors (see below), whose sum is σ = 51605455286. Its totient is φ = 19047798000.

The previous prime is 31428876499. The next prime is 31428876509. The reversal of 31428876501 is 10567882413.

31428876501 is a `hidden beast` number, since 31 + 42 + 8 + 8 + 76 + 501 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31403384100 + 25492401 = 177210^2 + 5049^2 .

It is not a de Polignac number, because 31428876501 - 2¹ = 31428876499 is a prime.

It is a super-2 number, since 2×31428876501² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31428876509) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1593550 + ... + 1613151.

Almost surely, 2^31428876501 is an apocalyptic number.

It is an amenable number.

31428876501 is a deficient number, since it is larger than the sum of its proper divisors (20176578785).

31428876501 is a wasteful number, since it uses less digits than its factorization.

31428876501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206735 (or 3206715 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 31428876501 in words is "thirty-one billion, four hundred twenty-eight million, eight hundred seventy-six thousand, five hundred one".