57551121 has 32 divisors (see below), whose sum is σ = 87911040. Its totient is φ = 37195200.

The previous prime is 57551111. The next prime is 57551149. The reversal of 57551121 is 12115575.

It is not a de Polignac number, because 57551121 - 2¹¹ = 57549073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57551111) 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, 136491 + ... + 136911.

It is an arithmetic number, because the mean of its divisors is an integer number (2747220).

Almost surely, 2^57551121 is an apocalyptic number.

It is an amenable number.

57551121 is a deficient number, since it is larger than the sum of its proper divisors (30359919).

57551121 is a wasteful number, since it uses less digits than its factorization.

57551121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 568 counting only the distinct ones).

The product of its digits is 1750, while the sum is 27.

The square root of 57551121 is about 7586.2455140867. The cubic root of 57551121 is about 386.0864818262.

Adding to 57551121 its reverse (12115575), we get a palindrome (69666696).

The spelling of 57551121 in words is "fifty-seven million, five hundred fifty-one thousand, one hundred twenty-one".