47156531 has 4 divisors (see below), whose sum is σ = 47292000. Its totient is φ = 47021064.

The previous prime is 47156503. The next prime is 47156539. The reversal of 47156531 is 13565174.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47156531 is a prime.

It is a super-2 number, since 2×47156531² = 4447476831907922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47156539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67211 + ... + 67908.

It is an arithmetic number, because the mean of its divisors is an integer number (11823000).

Almost surely, 2^47156531 is an apocalyptic number.

47156531 is a deficient number, since it is larger than the sum of its proper divisors (135469).

47156531 is a wasteful number, since it uses less digits than its factorization.

47156531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135468.

The product of its digits is 12600, while the sum is 32.

The square root of 47156531 is about 6867.0613074298. The cubic root of 47156531 is about 361.2827975155.

The spelling of 47156531 in words is "forty-seven million, one hundred fifty-six thousand, five hundred thirty-one".