56515471 has 2 divisors, whose sum is σ = 56515472. Its totient is φ = 56515470.

The previous prime is 56515453. The next prime is 56515483. The reversal of 56515471 is 17451565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56515471 - 2²¹ = 54418319 is a prime.

It is a super-3 number, since 3×56515471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56515421) 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, 28257735 + 28257736.

It is an arithmetic number, because the mean of its divisors is an integer number (28257736).

Almost surely, 2^56515471 is an apocalyptic number.

56515471 is a deficient number, since it is larger than the sum of its proper divisors (1).

56515471 is an equidigital number, since it uses as much as digits as its factorization.

56515471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 34.

The square root of 56515471 is about 7517.6772343590. The cubic root of 56515471 is about 383.7565346707.

The spelling of 56515471 in words is "fifty-six million, five hundred fifteen thousand, four hundred seventy-one".