123253131015 has 96 divisors (see below), whose sum is σ = 247781154816. Its totient is φ = 55510064640.

The previous prime is 123253131013. The next prime is 123253131019. The reversal of 123253131015 is 510131352321.

123253131015 is a `hidden beast` number, since 1 + 2 + 325 + 313 + 10 + 15 = 666.

It is not a de Polignac number, because 123253131015 - 2¹ = 123253131013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123253131015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123253131013) 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 95 ways as a sum of consecutive naturals, for example, 24993100 + ... + 24998030.

It is an arithmetic number, because the mean of its divisors is an integer number (2581053696).

Almost surely, 2^123253131015 is an apocalyptic number.

123253131015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123253131015 is an abundant number, since it is smaller than the sum of its proper divisors (124528023801).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123253131015 is a wasteful number, since it uses less digits than its factorization.

123253131015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6109 (or 6106 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 123253131015 its reverse (510131352321), we get a palindrome (633384483336).

The spelling of 123253131015 in words is "one hundred twenty-three billion, two hundred fifty-three million, one hundred thirty-one thousand, fifteen".