55224891 has 12 divisors (see below), whose sum is σ = 84461832. Its totient is φ = 34650816.

The previous prime is 55224877. The next prime is 55224899. The reversal of 55224891 is 19842255.

55224891 is a `hidden beast` number, since 5 + 522 + 48 + 91 = 666.

It is not a de Polignac number, because 55224891 - 2¹⁴ = 55208507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55224899) 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, 180321 + ... + 180626.

It is an arithmetic number, because the mean of its divisors is an integer number (7038486).

Almost surely, 2^55224891 is an apocalyptic number.

55224891 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

55224891 is a deficient number, since it is larger than the sum of its proper divisors (29236941).

55224891 is a wasteful number, since it uses less digits than its factorization.

55224891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360970 (or 360967 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 55224891 is about 7431.3451675992. The cubic root of 55224891 is about 380.8128744022.

The spelling of 55224891 in words is "fifty-five million, two hundred twenty-four thousand, eight hundred ninety-one".