47131816 has 8 divisors (see below), whose sum is σ = 88372170. Its totient is φ = 23565904.

The previous prime is 47131813. The next prime is 47131817. The reversal of 47131816 is 61813174.

47131816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44275716 + 2856100 = 6654^2 + 1690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (47131813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2945731 + ... + 2945746.

Almost surely, 2^47131816 is an apocalyptic number.

It is an amenable number.

47131816 is a deficient number, since it is larger than the sum of its proper divisors (41240354).

47131816 is a wasteful number, since it uses less digits than its factorization.

47131816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5891483 (or 5891479 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 47131816 is about 6865.2615390821. The cubic root of 47131816 is about 361.2196697116.

The spelling of 47131816 in words is "forty-seven million, one hundred thirty-one thousand, eight hundred sixteen".