55987599 has 8 divisors (see below), whose sum is σ = 74712880. Its totient is φ = 37293696.

The previous prime is 55987583. The next prime is 55987609. The reversal of 55987599 is 99578955.

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

It is not a de Polignac number, because 55987599 - 2⁴ = 55987583 is a prime.

It is a super-2 number, since 2×55987599² = 6269222483569602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55982599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3304 + ... + 11085.

It is an arithmetic number, because the mean of its divisors is an integer number (9339110).

Almost surely, 2^55987599 is an apocalyptic number.

55987599 is a deficient number, since it is larger than the sum of its proper divisors (18725281).

55987599 is a wasteful number, since it uses less digits than its factorization.

55987599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15689.

The product of its digits is 5103000, while the sum is 57.

The square root of 55987599 is about 7482.4861510062. The cubic root of 55987599 is about 382.5579936844.

The spelling of 55987599 in words is "fifty-five million, nine hundred eighty-seven thousand, five hundred ninety-nine".