47071431831 has 16 divisors (see below), whose sum is σ = 62848306944. Its totient is φ = 31337789184.

The previous prime is 47071431791. The next prime is 47071431833. The reversal of 47071431831 is 13813417074.

It is not a de Polignac number, because 47071431831 - 2²¹ = 47069334679 is a prime.

It is a super-2 number, since 2×47071431831² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47071431831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47071431833) 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, 13012135 + ... + 13015751.

It is an arithmetic number, because the mean of its divisors is an integer number (3928019184).

Almost surely, 2^47071431831 is an apocalyptic number.

47071431831 is a deficient number, since it is larger than the sum of its proper divisors (15776875113).

47071431831 is a wasteful number, since it uses less digits than its factorization.

47071431831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8390.

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 47071431831 in words is "forty-seven billion, seventy-one million, four hundred thirty-one thousand, eight hundred thirty-one".