55993615 has 16 divisors (see below), whose sum is σ = 70373376. Its totient is φ = 42688800.

The previous prime is 55993603. The next prime is 55993633. The reversal of 55993615 is 51639955.

It is not a de Polignac number, because 55993615 - 2⁹ = 55993103 is a prime.

It is a congruent number.

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, 37330 + ... + 38800.

It is an arithmetic number, because the mean of its divisors is an integer number (4398336).

Almost surely, 2^55993615 is an apocalyptic number.

55993615 is a deficient number, since it is larger than the sum of its proper divisors (14379761).

55993615 is a wasteful number, since it uses less digits than its factorization.

55993615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830.

The product of its digits is 182250, while the sum is 43.

The square root of 55993615 is about 7482.8881456293. Note that the first 3 decimals coincide. The cubic root of 55993615 is about 382.5716954475.

The spelling of 55993615 in words is "fifty-five million, nine hundred ninety-three thousand, six hundred fifteen".