55459815 has 8 divisors (see below), whose sum is σ = 88735728. Its totient is φ = 29578560.

The previous prime is 55459813. The next prime is 55459819. The reversal of 55459815 is 51895455.

It is a happy number.

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

It is not a de Polignac number, because 55459815 - 2¹ = 55459813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55459813) 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, 1848646 + ... + 1848675.

It is an arithmetic number, because the mean of its divisors is an integer number (11091966).

Almost surely, 2^55459815 is an apocalyptic number.

55459815 is a deficient number, since it is larger than the sum of its proper divisors (33275913).

55459815 is a wasteful number, since it uses less digits than its factorization.

55459815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697329.

The product of its digits is 180000, while the sum is 42.

The square root of 55459815 is about 7447.1346838902. The cubic root of 55459815 is about 381.3520969958.

The spelling of 55459815 in words is "fifty-five million, four hundred fifty-nine thousand, eight hundred fifteen".