55133431123 has 6 divisors (see below), whose sum is σ = 57634759364. Its totient is φ = 52736324916.

The previous prime is 55133431099. The next prime is 55133431139. The reversal of 55133431123 is 32113433155.

It is a happy number.

It is not a de Polignac number, because 55133431123 - 2²⁵ = 55099876691 is a prime.

It is a super-2 number, since 2×55133431123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55133431163) 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 5 ways as a sum of consecutive naturals, for example, 52110465 + ... + 52111522.

Almost surely, 2^55133431123 is an apocalyptic number.

55133431123 is a deficient number, since it is larger than the sum of its proper divisors (2501328241).

55133431123 is a wasteful number, since it uses less digits than its factorization.

55133431123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104222033 (or 104222010 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

Adding to 55133431123 its reverse (32113433155), we get a palindrome (87246864278).

The spelling of 55133431123 in words is "fifty-five billion, one hundred thirty-three million, four hundred thirty-one thousand, one hundred twenty-three".