55315257 has 8 divisors (see below), whose sum is σ = 74292576. Its totient is φ = 36607392.

The previous prime is 55315237. The next prime is 55315279. The reversal of 55315257 is 75251355.

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

It is not a de Polignac number, because 55315257 - 2¹⁵ = 55282489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55315237) 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, 66883 + ... + 67704.

It is an arithmetic number, because the mean of its divisors is an integer number (9286572).

Almost surely, 2^55315257 is an apocalyptic number.

It is an amenable number.

55315257 is a deficient number, since it is larger than the sum of its proper divisors (18977319).

55315257 is a wasteful number, since it uses less digits than its factorization.

55315257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134727.

The product of its digits is 26250, while the sum is 33.

The square root of 55315257 is about 7437.4227390945. The cubic root of 55315257 is about 381.0204727186.

The spelling of 55315257 in words is "fifty-five million, three hundred fifteen thousand, two hundred fifty-seven".