55123243131 has 16 divisors (see below), whose sum is σ = 80251614720. Its totient is φ = 33377879520.

The previous prime is 55123243127. The next prime is 55123243159. The reversal of 55123243131 is 13134232155.

It is not a de Polignac number, because 55123243131 - 2² = 55123243127 is a prime.

It is a super-2 number, since 2×55123243131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55123243111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 716515 + ... + 789708.

It is an arithmetic number, because the mean of its divisors is an integer number (5015725920).

Almost surely, 2^55123243131 is an apocalyptic number.

55123243131 is a deficient number, since it is larger than the sum of its proper divisors (25128371589).

55123243131 is a wasteful number, since it uses less digits than its factorization.

55123243131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507346.

The product of its digits is 10800, while the sum is 30.

Adding to 55123243131 its reverse (13134232155), we get a palindrome (68257475286).

The spelling of 55123243131 in words is "fifty-five billion, one hundred twenty-three million, two hundred forty-three thousand, one hundred thirty-one".