47772531 has 16 divisors (see below), whose sum is σ = 70992000. Its totient is φ = 31750344.

The previous prime is 47772497. The next prime is 47772547. The reversal of 47772531 is 13527774.

It is not a de Polignac number, because 47772531 - 2⁶ = 47772467 is a prime.

It is a super-2 number, since 2×47772531² = 4564429436291922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47772931) 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, 6820 + ... + 11918.

It is an arithmetic number, because the mean of its divisors is an integer number (4437000).

Almost surely, 2^47772531 is an apocalyptic number.

47772531 is a deficient number, since it is larger than the sum of its proper divisors (23219469).

47772531 is a wasteful number, since it uses less digits than its factorization.

47772531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455 (or 5449 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 47772531 is about 6911.7675742172. The cubic root of 47772531 is about 362.8491279315.

The spelling of 47772531 in words is "forty-seven million, seven hundred seventy-two thousand, five hundred thirty-one".