56831471 has 2 divisors, whose sum is σ = 56831472. Its totient is φ = 56831470.

The previous prime is 56831461. The next prime is 56831473. The reversal of 56831471 is 17413865.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56831471 is a prime.

It is a super-3 number, since 3×56831471³ (a number of 24 digits) contains 333 as substring.

Together with 56831473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56831473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28415735 + 28415736.

It is an arithmetic number, because the mean of its divisors is an integer number (28415736).

Almost surely, 2^56831471 is an apocalyptic number.

56831471 is a deficient number, since it is larger than the sum of its proper divisors (1).

56831471 is an equidigital number, since it uses as much as digits as its factorization.

56831471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 56831471 is about 7538.6650675037. The cubic root of 56831471 is about 384.4704497879.

The spelling of 56831471 in words is "fifty-six million, eight hundred thirty-one thousand, four hundred seventy-one".