57551320 has 32 divisors (see below), whose sum is σ = 130521600. Its totient is φ = 22837248.

The previous prime is 57551293. The next prime is 57551327. The reversal of 57551320 is 2315575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57551327) 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, 585 + ... + 10744.

It is an arithmetic number, because the mean of its divisors is an integer number (4078800).

Almost surely, 2^57551320 is an apocalyptic number.

It is an amenable number.

57551320 is an abundant number, since it is smaller than the sum of its proper divisors (72970280).

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

57551320 is a wasteful number, since it uses less digits than its factorization.

57551320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11467 (or 11463 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 57551320 is about 7586.2586299176. The cubic root of 57551320 is about 386.0869268284.

Adding to 57551320 its reverse (2315575), we get a palindrome (59866895).

The spelling of 57551320 in words is "fifty-seven million, five hundred fifty-one thousand, three hundred twenty".