55045518 has 16 divisors (see below), whose sum is σ = 120099456. Its totient is φ = 16680440.

The previous prime is 55045513. The next prime is 55045531. The reversal of 55045518 is 81554055.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55045511) 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, 416946 + ... + 417077.

It is an arithmetic number, because the mean of its divisors is an integer number (7506216).

Almost surely, 2^55045518 is an apocalyptic number.

55045518 is an abundant number, since it is smaller than the sum of its proper divisors (65053938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55045518 is a wasteful number, since it uses less digits than its factorization.

55045518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834039.

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 55045518 is about 7419.2666753528. The cubic root of 55045518 is about 380.4001279299.

The spelling of 55045518 in words is "fifty-five million, forty-five thousand, five hundred eighteen".