55211858231 has 4 divisors (see below), whose sum is σ = 55213939200. Its totient is φ = 55209777264.

The previous prime is 55211858203. The next prime is 55211858269. The reversal of 55211858231 is 13285811255.

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 55211858231 - 2³⁰ = 54138116407 is a prime.

It is a super-2 number, since 2×55211858231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55211858431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000166 + ... + 1053923.

It is an arithmetic number, because the mean of its divisors is an integer number (13803484800).

Almost surely, 2^55211858231 is an apocalyptic number.

55211858231 is a deficient number, since it is larger than the sum of its proper divisors (2080969).

55211858231 is a wasteful number, since it uses less digits than its factorization.

55211858231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080968.

The product of its digits is 96000, while the sum is 41.

The spelling of 55211858231 in words is "fifty-five billion, two hundred eleven million, eight hundred fifty-eight thousand, two hundred thirty-one".