55221492 has 24 divisors (see below), whose sum is σ = 129077536. Its totient is φ = 18374688.

The previous prime is 55221487. The next prime is 55221499. The reversal of 55221492 is 29412255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55221499) 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, 3603 + ... + 11109.

Almost surely, 2^55221492 is an apocalyptic number.

It is an amenable number.

55221492 is an abundant number, since it is smaller than the sum of its proper divisors (73856044).

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

55221492 is a wasteful number, since it uses less digits than its factorization.

55221492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8127 (or 8125 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 55221492 is about 7431.1164706254. The cubic root of 55221492 is about 380.8050614426.

The spelling of 55221492 in words is "fifty-five million, two hundred twenty-one thousand, four hundred ninety-two".