55399355 has 16 divisors (see below), whose sum is σ = 72905184. Its totient is φ = 40078080.

The previous prime is 55399349. The next prime is 55399369.

It is a happy number.

55399355 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55399355 - 2²⁴ = 38622139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8279 + ... + 13391.

It is an arithmetic number, because the mean of its divisors is an integer number (4556574).

Almost surely, 2^55399355 is an apocalyptic number.

55399355 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55399355 is a deficient number, since it is larger than the sum of its proper divisors (17505829).

55399355 is a wasteful number, since it uses less digits than its factorization.

55399355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326.

The product of its digits is 455625, while the sum is 44.

The square root of 55399355 is about 7443.0742976273. The cubic root of 55399355 is about 381.2134685054.

The spelling of 55399355 in words is "fifty-five million, three hundred ninety-nine thousand, three hundred fifty-five".