55615087 has 4 divisors (see below), whose sum is σ = 60671016. Its totient is φ = 50559160.

The previous prime is 55615067. The next prime is 55615093. The reversal of 55615087 is 78051655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55615087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55615037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2527948 + ... + 2527969.

It is an arithmetic number, because the mean of its divisors is an integer number (15167754).

Almost surely, 2^55615087 is an apocalyptic number.

55615087 is a deficient number, since it is larger than the sum of its proper divisors (5055929).

55615087 is a wasteful number, since it uses less digits than its factorization.

55615087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055928.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 55615087 is about 7457.5523464472. The cubic root of 55615087 is about 381.7076585158.

It can be divided in two parts, 5561 and 5087, that added together give a cube (10648 = 22³).

The spelling of 55615087 in words is "fifty-five million, six hundred fifteen thousand, eighty-seven".