47031315431 has 4 divisors (see below), whose sum is σ = 47802320664. Its totient is φ = 46260310200.

The previous prime is 47031315389. The next prime is 47031315451. The reversal of 47031315431 is 13451313074.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47031315431 is a prime.

It is a super-2 number, since 2×47031315431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47031315451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385502525 + ... + 385502646.

It is an arithmetic number, because the mean of its divisors is an integer number (11950580166).

Almost surely, 2^47031315431 is an apocalyptic number.

47031315431 is a deficient number, since it is larger than the sum of its proper divisors (771005233).

47031315431 is an equidigital number, since it uses as much as digits as its factorization.

47031315431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771005232.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 47031315431 in words is "forty-seven billion, thirty-one million, three hundred fifteen thousand, four hundred thirty-one".