54221636 has 36 divisors (see below), whose sum is σ = 116879868. Its totient is φ = 21869568.

The previous prime is 54221633. The next prime is 54221641. The reversal of 54221636 is 63612245.

It can be written as a sum of positive squares in 2 ways, for example, as 48219136 + 6002500 = 6944^2 + 2450^2 .

It is a junction number, because it is equal to n+sod(n) for n = 54221599 and 54221608.

It is not an unprimeable number, because it can be changed into a prime (54221633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4805 + ... + 11468.

It is an arithmetic number, because the mean of its divisors is an integer number (3246663).

Almost surely, 2^54221636 is an apocalyptic number.

It is an amenable number.

54221636 is an abundant number, since it is smaller than the sum of its proper divisors (62658232).

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

54221636 is a wasteful number, since it uses less digits than its factorization.

54221636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16308 (or 16299 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 54221636 is about 7363.5342058009. The cubic root of 54221636 is about 378.4927273583.

The spelling of 54221636 in words is "fifty-four million, two hundred twenty-one thousand, six hundred thirty-six".