55321299 has 40 divisors (see below), whose sum is σ = 93305520. Its totient is φ = 32356800.

The previous prime is 55321289. The next prime is 55321307. The reversal of 55321299 is 99212355.

It is a happy number.

55321299 is a `hidden beast` number, since 553 + 2 + 12 + 99 = 666.

It is not a de Polignac number, because 55321299 - 2¹³ = 55313107 is a prime.

It is a super-2 number, since 2×55321299² = 6120892246094802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55321289) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 24769 + ... + 26909.

It is an arithmetic number, because the mean of its divisors is an integer number (2332638).

Almost surely, 2^55321299 is an apocalyptic number.

55321299 is a deficient number, since it is larger than the sum of its proper divisors (37984221).

55321299 is a wasteful number, since it uses less digits than its factorization.

55321299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193 (or 2184 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 55321299 is about 7437.8289170967. The cubic root of 55321299 is about 381.0343449726.

The spelling of 55321299 in words is "fifty-five million, three hundred twenty-one thousand, two hundred ninety-nine".