55938815 has 4 divisors (see below), whose sum is σ = 67126584. Its totient is φ = 44751048.

The previous prime is 55938811. The next prime is 55938847. The reversal of 55938815 is 51883955.

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

It is a cyclic number.

It is not a de Polignac number, because 55938815 - 2² = 55938811 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55938811) 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, 5593877 + ... + 5593886.

It is an arithmetic number, because the mean of its divisors is an integer number (16781646).

Almost surely, 2^55938815 is an apocalyptic number.

55938815 is a deficient number, since it is larger than the sum of its proper divisors (11187769).

55938815 is a wasteful number, since it uses less digits than its factorization.

55938815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11187768.

The product of its digits is 216000, while the sum is 44.

The square root of 55938815 is about 7479.2255615137. The cubic root of 55938815 is about 382.4468492368.

The spelling of 55938815 in words is "fifty-five million, nine hundred thirty-eight thousand, eight hundred fifteen".