55869571 has 2 divisors, whose sum is σ = 55869572. Its totient is φ = 55869570.

The previous prime is 55869529. The next prime is 55869589. The reversal of 55869571 is 17596855.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55869571 - 2²³ = 47480963 is a prime.

It is not a weakly prime, because it can be changed into another prime (55869071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27934785 + 27934786.

It is an arithmetic number, because the mean of its divisors is an integer number (27934786).

Almost surely, 2^55869571 is an apocalyptic number.

55869571 is a deficient number, since it is larger than the sum of its proper divisors (1).

55869571 is an equidigital number, since it uses as much as digits as its factorization.

55869571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 46.

The square root of 55869571 is about 7474.5950391978. The cubic root of 55869571 is about 382.2889798209.

The spelling of 55869571 in words is "fifty-five million, eight hundred sixty-nine thousand, five hundred seventy-one".