57015987 has 16 divisors (see below), whose sum is σ = 87013632. Its totient is φ = 32531040.

The previous prime is 57015947. The next prime is 57015991. The reversal of 57015987 is 78951075.

It is not a de Polignac number, because 57015987 - 2⁷ = 57015859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57015947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15588 + ... + 18894.

It is an arithmetic number, because the mean of its divisors is an integer number (5438352).

Almost surely, 2^57015987 is an apocalyptic number.

57015987 is a deficient number, since it is larger than the sum of its proper divisors (29997645).

57015987 is a wasteful number, since it uses less digits than its factorization.

57015987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 57015987 is about 7550.8931259819. The cubic root of 57015987 is about 384.8860898741.

The spelling of 57015987 in words is "fifty-seven million, fifteen thousand, nine hundred eighty-seven".