57561087 has 4 divisors (see below), whose sum is σ = 76748120. Its totient is φ = 38374056.

The previous prime is 57561083. The next prime is 57561109. The reversal of 57561087 is 78016575.

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

It is not a de Polignac number, because 57561087 - 2² = 57561083 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57561083) 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, 9593512 + ... + 9593517.

It is an arithmetic number, because the mean of its divisors is an integer number (19187030).

Almost surely, 2^57561087 is an apocalyptic number.

57561087 is a deficient number, since it is larger than the sum of its proper divisors (19187033).

57561087 is a wasteful number, since it uses less digits than its factorization.

57561087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19187032.

The product of its (nonzero) digits is 58800, while the sum is 39.

The square root of 57561087 is about 7586.9023323093. The cubic root of 57561087 is about 386.1087664533.

The spelling of 57561087 in words is "fifty-seven million, five hundred sixty-one thousand, eighty-seven".