47315631 has 16 divisors (see below), whose sum is σ = 68964480. Its totient is φ = 28617120.

The previous prime is 47315627. The next prime is 47315647. The reversal of 47315631 is 13651374.

It is not a de Polignac number, because 47315631 - 2² = 47315627 is a prime.

It is a super-2 number, since 2×47315631² = 4477537873856322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47315621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19060 + ... + 21398.

It is an arithmetic number, because the mean of its divisors is an integer number (4310280).

Almost surely, 2^47315631 is an apocalyptic number.

47315631 is a deficient number, since it is larger than the sum of its proper divisors (21648849).

47315631 is a wasteful number, since it uses less digits than its factorization.

47315631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966.

The product of its digits is 7560, while the sum is 30.

The square root of 47315631 is about 6878.6358385947. The cubic root of 47315631 is about 361.6886484784.

The spelling of 47315631 in words is "forty-seven million, three hundred fifteen thousand, six hundred thirty-one".