55255257 has 16 divisors (see below), whose sum is σ = 82188480. Its totient is φ = 36688896.

The previous prime is 55255243. The next prime is 55255259. The reversal of 55255257 is 75255255.

55255257 is a `hidden beast` number, since 5 + 52 + 552 + 57 = 666.

It is not a de Polignac number, because 55255257 - 2⁴ = 55255241 is a prime.

It is a super-2 number, since 2×55255257² = 6106286852272098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55255259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2958 + ... + 10920.

It is an arithmetic number, because the mean of its divisors is an integer number (5136780).

Almost surely, 2^55255257 is an apocalyptic number.

It is an amenable number.

55255257 is a deficient number, since it is larger than the sum of its proper divisors (26933223).

55255257 is a wasteful number, since it uses less digits than its factorization.

55255257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8229 (or 8223 counting only the distinct ones).

The product of its digits is 87500, while the sum is 36.

The square root of 55255257 is about 7433.3879893357. The cubic root of 55255257 is about 380.8826596306.

The spelling of 55255257 in words is "fifty-five million, two hundred fifty-five thousand, two hundred fifty-seven".