55870291 has 2 divisors, whose sum is σ = 55870292. Its totient is φ = 55870290.

The previous prime is 55870273. The next prime is 55870303. The reversal of 55870291 is 19207855.

55870291 is nontrivially palindromic in base 8.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55870291 - 2⁷ = 55870163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55870291.

It is not a weakly prime, because it can be changed into another prime (55870231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27935145 + 27935146.

It is an arithmetic number, because the mean of its divisors is an integer number (27935146).

Almost surely, 2^55870291 is an apocalyptic number.

55870291 is a deficient number, since it is larger than the sum of its proper divisors (1).

55870291 is an equidigital number, since it uses as much as digits as its factorization.

55870291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 55870291 is about 7474.6432021870. The cubic root of 55870291 is about 382.2906220201.

The spelling of 55870291 in words is "fifty-five million, eight hundred seventy thousand, two hundred ninety-one".