123031400225551 has 16 divisors (see below), whose sum is σ = 125908868892960. Its totient is φ = 120174601772160.

The previous prime is 123031400225533. The next prime is 123031400225567. The reversal of 123031400225551 is 155522004130321.

It is a cyclic number.

It is not a de Polignac number, because 123031400225551 - 2⁷ = 123031400225423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031400225581) 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, 178446081 + ... + 179134213.

It is an arithmetic number, because the mean of its divisors is an integer number (7869304305810).

Almost surely, 2^{123031400225551} is an apocalyptic number.

123031400225551 is a deficient number, since it is larger than the sum of its proper divisors (2877468667409).

123031400225551 is a wasteful number, since it uses less digits than its factorization.

123031400225551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703146.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 123031400225551 its reverse (155522004130321), we get a palindrome (278553404355872).

The spelling of 123031400225551 in words is "one hundred twenty-three trillion, thirty-one billion, four hundred million, two hundred twenty-five thousand, five hundred fifty-one".