55905251 has 8 divisors (see below), whose sum is σ = 56566224. Its totient is φ = 55248480.

The previous prime is 55905233. The next prime is 55905257. The reversal of 55905251 is 15250955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55905251 - 2¹⁰ = 55904227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55905257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31241 + ... + 32981.

It is an arithmetic number, because the mean of its divisors is an integer number (7070778).

Almost surely, 2^55905251 is an apocalyptic number.

55905251 is a deficient number, since it is larger than the sum of its proper divisors (660973).

55905251 is a wasteful number, since it uses less digits than its factorization.

55905251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101.

The product of its (nonzero) digits is 11250, while the sum is 32.

The square root of 55905251 is about 7476.9814096332. The cubic root of 55905251 is about 382.3703429430.

The spelling of 55905251 in words is "fifty-five million, nine hundred five thousand, two hundred fifty-one".