47815917431 has 16 divisors (see below), whose sum is σ = 50016320640. Its totient is φ = 45653835360.

The previous prime is 47815917407. The next prime is 47815917433. The reversal of 47815917431 is 13471951874.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47815917431 is a prime.

It is a super-2 number, since 2×47815917431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47815917431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47815917433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1758320 + ... + 1785306.

It is an arithmetic number, because the mean of its divisors is an integer number (3126020040).

Almost surely, 2^47815917431 is an apocalyptic number.

47815917431 is a deficient number, since it is larger than the sum of its proper divisors (2200403209).

47815917431 is a wasteful number, since it uses less digits than its factorization.

47815917431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27694.

The product of its digits is 846720, while the sum is 50.

The spelling of 47815917431 in words is "forty-seven billion, eight hundred fifteen million, nine hundred seventeen thousand, four hundred thirty-one".