56551587 has 16 divisors (see below), whose sum is σ = 77642880. Its totient is φ = 36590400.

The previous prime is 56551553. The next prime is 56551589. The reversal of 56551587 is 78515565.

It is not a de Polignac number, because 56551587 - 2¹⁰ = 56550563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56551589) 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, 24864 + ... + 27042.

It is an arithmetic number, because the mean of its divisors is an integer number (4852680).

Almost surely, 2^56551587 is an apocalyptic number.

56551587 is a deficient number, since it is larger than the sum of its proper divisors (21091293).

56551587 is a wasteful number, since it uses less digits than its factorization.

56551587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434.

The product of its digits is 210000, while the sum is 42.

The square root of 56551587 is about 7520.0789224582. The cubic root of 56551587 is about 383.8382633223.

The spelling of 56551587 in words is "fifty-six million, five hundred fifty-one thousand, five hundred eighty-seven".