123031132153015 has 4 divisors (see below), whose sum is σ = 147637358583624. Its totient is φ = 98424905722408.

The previous prime is 123031132153009. The next prime is 123031132153019. The reversal of 123031132153015 is 510351231130321.

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 123031132153015 - 2⁵ = 123031132152983 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 (123031132153019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12303113215297 + ... + 12303113215306.

It is an arithmetic number, because the mean of its divisors is an integer number (36909339645906).

Almost surely, 2^{123031132153015} is an apocalyptic number.

123031132153015 is a deficient number, since it is larger than the sum of its proper divisors (24606226430609).

123031132153015 is an equidigital number, since it uses as much as digits as its factorization.

123031132153015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24606226430608.

The product of its (nonzero) digits is 8100, while the sum is 31.

Adding to 123031132153015 its reverse (510351231130321), we get a palindrome (633382363283336).

The spelling of 123031132153015 in words is "one hundred twenty-three trillion, thirty-one billion, one hundred thirty-two million, one hundred fifty-three thousand, fifteen".