55057317 has 32 divisors (see below), whose sum is σ = 86169600. Its totient is φ = 30621888.

The previous prime is 55057309. The next prime is 55057349. The reversal of 55057317 is 71375055.

It is not a de Polignac number, because 55057317 - 2³ = 55057309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55057397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153184 + ... + 153542.

It is an arithmetic number, because the mean of its divisors is an integer number (2692800).

Almost surely, 2^55057317 is an apocalyptic number.

It is an amenable number.

55057317 is a deficient number, since it is larger than the sum of its proper divisors (31112283).

55057317 is a wasteful number, since it uses less digits than its factorization.

55057317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545.

The product of its (nonzero) digits is 18375, while the sum is 33.

The square root of 55057317 is about 7420.0617921955. The cubic root of 55057317 is about 380.4273055617.

The spelling of 55057317 in words is "fifty-five million, fifty-seven thousand, three hundred seventeen".