47531812 has 24 divisors (see below), whose sum is σ = 86922360. Its totient is φ = 22713600.

The previous prime is 47531807. The next prime is 47531819. The reversal of 47531812 is 21813574.

It can be written as a sum of positive squares in 4 ways, for example, as 19927296 + 27604516 = 4464^2 + 5254^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (47531819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9688 + ... + 13744.

It is an arithmetic number, because the mean of its divisors is an integer number (3621765).

Almost surely, 2^47531812 is an apocalyptic number.

It is an amenable number.

47531812 is a deficient number, since it is larger than the sum of its proper divisors (39390548).

47531812 is a wasteful number, since it uses less digits than its factorization.

47531812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191 (or 4189 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 47531812 is about 6894.3318748085. The cubic root of 47531812 is about 362.2386530046.

The spelling of 47531812 in words is "forty-seven million, five hundred thirty-one thousand, eight hundred twelve".