12251113515 has 24 divisors (see below), whose sum is σ = 22021756848. Its totient is φ = 6533926560.

The previous prime is 12251113477. The next prime is 12251113519. The reversal of 12251113515 is 51531115221.

It is a happy number.

12251113515 is a `hidden beast` number, since 1 + 2 + 2 + 511 + 135 + 15 = 666.

It is not a de Polignac number, because 12251113515 - 2¹⁰ = 12251112491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12251113519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5040396 + ... + 5042825.

It is an arithmetic number, because the mean of its divisors is an integer number (917573202).

Almost surely, 2^12251113515 is an apocalyptic number.

12251113515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12251113515 is a deficient number, since it is larger than the sum of its proper divisors (9770643333).

12251113515 is an equidigital number, since it uses as much as digits as its factorization.

12251113515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10083241 (or 10083229 counting only the distinct ones).

The product of its digits is 1500, while the sum is 27.

Adding to 12251113515 its reverse (51531115221), we get a palindrome (63782228736).

The spelling of 12251113515 in words is "twelve billion, two hundred fifty-one million, one hundred thirteen thousand, five hundred fifteen".