56621471 has 2 divisors, whose sum is σ = 56621472. Its totient is φ = 56621470.

The previous prime is 56621447. The next prime is 56621479. The reversal of 56621471 is 17412665.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56621471 is a prime.

It is a super-3 number, since 3×56621471³ (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 (56621479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28310735 + 28310736.

It is an arithmetic number, because the mean of its divisors is an integer number (28310736).

Almost surely, 2^56621471 is an apocalyptic number.

56621471 is a deficient number, since it is larger than the sum of its proper divisors (1).

56621471 is an equidigital number, since it uses as much as digits as its factorization.

56621471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 56621471 is about 7524.7239816488. The cubic root of 56621471 is about 383.9963084678.

The spelling of 56621471 in words is "fifty-six million, six hundred twenty-one thousand, four hundred seventy-one".