55257558 has 8 divisors (see below), whose sum is σ = 110515128. Its totient is φ = 18419184.

The previous prime is 55257551. The next prime is 55257583. The reversal of 55257558 is 85575255.

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

55257558 is an admirable number.

It is a super-2 number, since 2×55257558² = 6106795432246728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55257551) 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, 4604791 + ... + 4604802.

It is an arithmetic number, because the mean of its divisors is an integer number (13814391).

Almost surely, 2^55257558 is an apocalyptic number.

55257558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55257558 is a wasteful number, since it uses less digits than its factorization.

55257558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9209598.

The product of its digits is 350000, while the sum is 42.

The square root of 55257558 is about 7433.5427623711. The cubic root of 55257558 is about 380.8879466017.

The spelling of 55257558 in words is "fifty-five million, two hundred fifty-seven thousand, five hundred fifty-eight".