55555331 has 8 divisors (see below), whose sum is σ = 60060000. Its totient is φ = 51083712.

The previous prime is 55555307. The next prime is 55555333. The reversal of 55555331 is 13355555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55555331 - 2⁶ = 55555267 is a prime.

It is a super-2 number, since 2×55555331² = 6172789605039122, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55555333) 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, 4706 + ... + 11543.

It is an arithmetic number, because the mean of its divisors is an integer number (7507500).

Almost surely, 2^55555331 is an apocalyptic number.

55555331 is a deficient number, since it is larger than the sum of its proper divisors (4504669).

55555331 is a wasteful number, since it uses less digits than its factorization.

55555331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16525.

The product of its digits is 28125, while the sum is 32.

The square root of 55555331 is about 7453.5448613395. The cubic root of 55555331 is about 381.5709000799.

The spelling of 55555331 in words is "fifty-five million, five hundred fifty-five thousand, three hundred thirty-one".