55322399 has 4 divisors (see below), whose sum is σ = 60351720. Its totient is φ = 50293080.

The previous prime is 55322389. The next prime is 55322411. The reversal of 55322399 is 99322355.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55322399 - 2⁸ = 55322143 is a prime.

It is a super-2 number, since 2×55322399² = 6121135662230402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55322329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2514644 + ... + 2514665.

It is an arithmetic number, because the mean of its divisors is an integer number (15087930).

Almost surely, 2^55322399 is an apocalyptic number.

55322399 is a deficient number, since it is larger than the sum of its proper divisors (5029321).

55322399 is a wasteful number, since it uses less digits than its factorization.

55322399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029320.

The product of its digits is 72900, while the sum is 38.

The square root of 55322399 is about 7437.9028630387. The cubic root of 55322399 is about 381.0368704315.

The spelling of 55322399 in words is "fifty-five million, three hundred twenty-two thousand, three hundred ninety-nine".