57555231 has 8 divisors (see below), whose sum is σ = 76849920. Its totient is φ = 38315352.

The previous prime is 57555229. The next prime is 57555233. The reversal of 57555231 is 13255575.

It is an interprime number because it is at equal distance from previous prime (57555229) and next prime (57555233).

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

It is not a de Polignac number, because 57555231 - 2¹ = 57555229 is a prime.

It is a super-2 number, since 2×57555231² = 6625209230926722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57555192 and 57555201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57555233) 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, 11185 + ... + 15498.

It is an arithmetic number, because the mean of its divisors is an integer number (9606240).

Almost surely, 2^57555231 is an apocalyptic number.

57555231 is a deficient number, since it is larger than the sum of its proper divisors (19294689).

57555231 is a wasteful number, since it uses less digits than its factorization.

57555231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27405.

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

The square root of 57555231 is about 7586.5163942352. The cubic root of 57555231 is about 386.0956723664.

The spelling of 57555231 in words is "fifty-seven million, five hundred fifty-five thousand, two hundred thirty-one".