55218468 has 24 divisors (see below), whose sum is σ = 128969568. Its totient is φ = 18388096.

The previous prime is 55218463. The next prime is 55218491. The reversal of 55218468 is 86481255.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55218463) 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, 17155 + ... + 20117.

It is an arithmetic number, because the mean of its divisors is an integer number (5373732).

Almost surely, 2^55218468 is an apocalyptic number.

It is an amenable number.

55218468 is an abundant number, since it is smaller than the sum of its proper divisors (73751100).

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

55218468 is a wasteful number, since it uses less digits than its factorization.

55218468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4523 (or 4521 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 55218468 is about 7430.9129990870. The cubic root of 55218468 is about 380.7981101906.

The spelling of 55218468 in words is "fifty-five million, two hundred eighteen thousand, four hundred sixty-eight".