55358815 has 32 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 40423680.

The previous prime is 55358791. The next prime is 55358819. The reversal of 55358815 is 51885355.

It is not a de Polignac number, because 55358815 - 2⁷ = 55358687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55358819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278086 + ... + 278284.

It is an arithmetic number, because the mean of its divisors is an integer number (2268000).

Almost surely, 2^55358815 is an apocalyptic number.

55358815 is a deficient number, since it is larger than the sum of its proper divisors (17217185).

55358815 is a wasteful number, since it uses less digits than its factorization.

55358815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327.

The product of its digits is 120000, while the sum is 40.

The square root of 55358815 is about 7440.3504621758. The cubic root of 55358815 is about 381.1204580045.

The spelling of 55358815 in words is "fifty-five million, three hundred fifty-eight thousand, eight hundred fifteen".