31490845651 has 8 divisors (see below), whose sum is σ = 33476461200. Its totient is φ = 29538050400.

The previous prime is 31490845649. The next prime is 31490845691. The reversal of 31490845651 is 15654809413.

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

It is a cyclic number.

It is not a de Polignac number, because 31490845651 - 2¹ = 31490845649 is a prime.

It is a super-2 number, since 2×31490845651² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31490845601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8203096 + ... + 8206933.

It is an arithmetic number, because the mean of its divisors is an integer number (4184557650).

Almost surely, 2^31490845651 is an apocalyptic number.

31490845651 is a deficient number, since it is larger than the sum of its proper divisors (1985615549).

31490845651 is a wasteful number, since it uses less digits than its factorization.

31490845651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16410149.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 31490845651 in words is "thirty-one billion, four hundred ninety million, eight hundred forty-five thousand, six hundred fifty-one".