55218135 has 16 divisors (see below), whose sum is σ = 100970496. Its totient is φ = 25242528.

The previous prime is 55218113. The next prime is 55218169. The reversal of 55218135 is 53181255.

It is not a de Polignac number, because 55218135 - 2⁶ = 55218071 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262839 + ... + 263048.

It is an arithmetic number, because the mean of its divisors is an integer number (6310656).

Almost surely, 2^55218135 is an apocalyptic number.

55218135 is a deficient number, since it is larger than the sum of its proper divisors (45752361).

55218135 is a wasteful number, since it uses less digits than its factorization.

55218135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525902.

The product of its digits is 6000, while the sum is 30.

The square root of 55218135 is about 7430.8905926544. The cubic root of 55218135 is about 380.7973447098.

The spelling of 55218135 in words is "fifty-five million, two hundred eighteen thousand, one hundred thirty-five".