47085831 has 12 divisors (see below), whose sum is σ = 73244808. Its totient is φ = 28975824.

The previous prime is 47085827. The next prime is 47085847. The reversal of 47085831 is 13858074.

47085831 is a `hidden beast` number, since 4 + 70 + 8 + 583 + 1 = 666.

It is not a de Polignac number, because 47085831 - 2² = 47085827 is a prime.

It is a super-2 number, since 2×47085831² = 4434150961921122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47085811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201105 + ... + 201338.

It is an arithmetic number, because the mean of its divisors is an integer number (6103734).

Almost surely, 2^47085831 is an apocalyptic number.

47085831 is a deficient number, since it is larger than the sum of its proper divisors (26158977).

47085831 is a wasteful number, since it uses less digits than its factorization.

47085831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402462 (or 402459 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 47085831 is about 6861.9116141204. The cubic root of 47085831 is about 361.1021546724.

The spelling of 47085831 in words is "forty-seven million, eighty-five thousand, eight hundred thirty-one".