54551557 has 4 divisors (see below), whose sum is σ = 55052140. Its totient is φ = 54050976.

The previous prime is 54551551. The next prime is 54551569. The reversal of 54551557 is 75515545.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41977441 + 12574116 = 6479^2 + 3546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54551557 is a prime.

It is a super-2 number, since 2×54551557² = 5951744742248498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54551551) 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, 250128 + ... + 250345.

It is an arithmetic number, because the mean of its divisors is an integer number (13763035).

Almost surely, 2^54551557 is an apocalyptic number.

It is an amenable number.

54551557 is a deficient number, since it is larger than the sum of its proper divisors (500583).

54551557 is a wasteful number, since it uses less digits than its factorization.

54551557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500582.

The product of its digits is 87500, while the sum is 37.

The square root of 54551557 is about 7385.9025853311. The cubic root of 54551557 is about 379.2588439314.

The spelling of 54551557 in words is "fifty-four million, five hundred fifty-one thousand, five hundred fifty-seven".