54515555 has 16 divisors (see below), whose sum is σ = 66727584. Its totient is φ = 42746880.

The previous prime is 54515551. The next prime is 54515557. The reversal of 54515555 is 55551545.

It is a happy number.

It is not a de Polignac number, because 54515555 - 2² = 54515551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54515551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118025 + ... + 118485.

It is an arithmetic number, because the mean of its divisors is an integer number (4170474).

Almost surely, 2^54515555 is an apocalyptic number.

54515555 is a deficient number, since it is larger than the sum of its proper divisors (12212029).

54515555 is a wasteful number, since it uses less digits than its factorization.

54515555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its digits is 62500, while the sum is 35.

The square root of 54515555 is about 7383.4649724909. The cubic root of 54515555 is about 379.1753933238.

The spelling of 54515555 in words is "fifty-four million, five hundred fifteen thousand, five hundred fifty-five".