55651587 has 8 divisors (see below), whose sum is σ = 74280960. Its totient is φ = 37061640.

The previous prime is 55651571. The next prime is 55651601. The reversal of 55651587 is 78515655.

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

It is not a de Polignac number, because 55651587 - 2⁴ = 55651571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55651187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6387 + ... + 12332.

It is an arithmetic number, because the mean of its divisors is an integer number (9285120).

Almost surely, 2^55651587 is an apocalyptic number.

55651587 is a deficient number, since it is larger than the sum of its proper divisors (18629373).

55651587 is a wasteful number, since it uses less digits than its factorization.

55651587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19713.

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

The square root of 55651587 is about 7459.9991286863. Note that the first 3 decimals coincide. The cubic root of 55651587 is about 381.7911447511.

The spelling of 55651587 in words is "fifty-five million, six hundred fifty-one thousand, five hundred eighty-seven".