113521251515 has 48 divisors (see below), whose sum is σ = 162257828832. Its totient is φ = 75983072256.

The previous prime is 113521251457. The next prime is 113521251517. The reversal of 113521251515 is 515152125311.

It is not a de Polignac number, because 113521251515 - 2²⁴ = 113504474299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113521251517) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23564387 + ... + 23569203.

It is an arithmetic number, because the mean of its divisors is an integer number (3380371434).

Almost surely, 2^113521251515 is an apocalyptic number.

113521251515 is a deficient number, since it is larger than the sum of its proper divisors (48736577317).

113521251515 is a wasteful number, since it uses less digits than its factorization.

113521251515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7116 (or 7109 counting only the distinct ones).

The product of its digits is 7500, while the sum is 32.

Adding to 113521251515 its reverse (515152125311), we get a palindrome (628673376826).

The spelling of 113521251515 in words is "one hundred thirteen billion, five hundred twenty-one million, two hundred fifty-one thousand, five hundred fifteen".