56538571 has 2 divisors, whose sum is σ = 56538572. Its totient is φ = 56538570.

The previous prime is 56538563. The next prime is 56538611. The reversal of 56538571 is 17583565.

It is an a-pointer prime, because the next prime (56538611) can be obtained adding 56538571 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56538571 - 2³ = 56538563 is a prime.

It is a super-2 number, since 2×56538571² = 6393220021444082, which contains 22 as substring.

It is equal to p_3368488 and since 56538571 and 3368488 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56538511) 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, 28269285 + 28269286.

It is an arithmetic number, because the mean of its divisors is an integer number (28269286).

Almost surely, 2^56538571 is an apocalyptic number.

56538571 is a deficient number, since it is larger than the sum of its proper divisors (1).

56538571 is an equidigital number, since it uses as much as digits as its factorization.

56538571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 40.

The square root of 56538571 is about 7519.2134562067. The cubic root of 56538571 is about 383.8088127949.

The spelling of 56538571 in words is "fifty-six million, five hundred thirty-eight thousand, five hundred seventy-one".