55651585 has 16 divisors (see below), whose sum is σ = 73529280. Its totient is φ = 40098240.

The previous prime is 55651571. The next prime is 55651601. The reversal of 55651585 is 58515655.

It is a happy number.

It is not a de Polignac number, because 55651585 - 2⁵ = 55651553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1354 + ... + 10636.

It is an arithmetic number, because the mean of its divisors is an integer number (4595580).

Almost surely, 2^55651585 is an apocalyptic number.

55651585 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55651585 is a deficient number, since it is larger than the sum of its proper divisors (17877695).

55651585 is a wasteful number, since it uses less digits than its factorization.

55651585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9408.

The product of its digits is 150000, while the sum is 40.

The square root of 55651585 is about 7459.9989946380. The cubic root of 55651585 is about 381.7911401776.

The spelling of 55651585 in words is "fifty-five million, six hundred fifty-one thousand, five hundred eighty-five".