55799257 has 4 divisors (see below), whose sum is σ = 58736080. Its totient is φ = 52862436.

The previous prime is 55799239. The next prime is 55799273. The reversal of 55799257 is 75299755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55799257 - 2⁷ = 55799129 is a prime.

It is a super-2 number, since 2×55799257² = 6227114163504098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55799257.

It is not an unprimeable number, because it can be changed into a prime (55799297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1468383 + ... + 1468420.

It is an arithmetic number, because the mean of its divisors is an integer number (14684020).

Almost surely, 2^55799257 is an apocalyptic number.

It is an amenable number.

55799257 is a deficient number, since it is larger than the sum of its proper divisors (2936823).

55799257 is a wasteful number, since it uses less digits than its factorization.

55799257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936822.

The product of its digits is 992250, while the sum is 49.

The square root of 55799257 is about 7469.8900259642. The cubic root of 55799257 is about 382.1285373752.

The spelling of 55799257 in words is "fifty-five million, seven hundred ninety-nine thousand, two hundred fifty-seven".