47138631 has 16 divisors (see below), whose sum is σ = 65095680. Its totient is φ = 30310560.

The previous prime is 47138627. The next prime is 47138681. The reversal of 47138631 is 13683174.

It is not a de Polignac number, because 47138631 - 2² = 47138627 is a prime.

It is a super-2 number, since 2×47138631² = 4444101065108322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47138592 and 47138601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47138681) 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, 35526 + ... + 36828.

It is an arithmetic number, because the mean of its divisors is an integer number (4068480).

Almost surely, 2^47138631 is an apocalyptic number.

47138631 is a deficient number, since it is larger than the sum of its proper divisors (17957049).

47138631 is a wasteful number, since it uses less digits than its factorization.

47138631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726.

The product of its digits is 12096, while the sum is 33.

The square root of 47138631 is about 6865.7578605715. The cubic root of 47138631 is about 361.2370789949.

The spelling of 47138631 in words is "forty-seven million, one hundred thirty-eight thousand, six hundred thirty-one".