101312520 has 64 divisors (see below), whose sum is σ = 321822720. Its totient is φ = 25426944.

The previous prime is 101312507. The next prime is 101312543. The reversal of 101312520 is 25213101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 101312520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22792 + ... + 26871.

It is an arithmetic number, because the mean of its divisors is an integer number (5028480).

Almost surely, 2^101312520 is an apocalyptic number.

101312520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101312520 is an abundant number, since it is smaller than the sum of its proper divisors (220510200).

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

101312520 is a wasteful number, since it uses less digits than its factorization.

101312520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49694 (or 49690 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 101312520 is about 10065.4120631000. The cubic root of 101312520 is about 466.1807890808.

Adding to 101312520 its reverse (25213101), we get a palindrome (126525621).

The spelling of 101312520 in words is "one hundred one million, three hundred twelve thousand, five hundred twenty".