54222640 has 20 divisors (see below), whose sum is σ = 126067824. Its totient is φ = 21689024.

The previous prime is 54222617. The next prime is 54222659. The reversal of 54222640 is 4622245.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338812 + ... + 338971.

Almost surely, 2^54222640 is an apocalyptic number.

It is an amenable number.

54222640 is an abundant number, since it is smaller than the sum of its proper divisors (71845184).

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

54222640 is a wasteful number, since it uses less digits than its factorization.

54222640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677796 (or 677790 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 54222640 is about 7363.6023792706. The cubic root of 54222640 is about 378.4950634758.

Adding to 54222640 its reverse (4622245), we get a palindrome (58844885).

The spelling of 54222640 in words is "fifty-four million, two hundred twenty-two thousand, six hundred forty".