15121232345 has 32 divisors (see below), whose sum is σ = 19516533120. Its totient is φ = 11224604160.

The previous prime is 15121232341. The next prime is 15121232351. The reversal of 15121232345 is 54323212151.

It is not a de Polignac number, because 15121232345 - 2² = 15121232341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (15121232341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 379334 + ... + 417296.

It is an arithmetic number, because the mean of its divisors is an integer number (609891660).

Almost surely, 2^15121232345 is an apocalyptic number.

It is an amenable number.

15121232345 is a deficient number, since it is larger than the sum of its proper divisors (4395300775).

15121232345 is a wasteful number, since it uses less digits than its factorization.

15121232345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38105.

The product of its digits is 7200, while the sum is 29.

Adding to 15121232345 its reverse (54323212151), we get a palindrome (69444444496).

The spelling of 15121232345 in words is "fifteen billion, one hundred twenty-one million, two hundred thirty-two thousand, three hundred forty-five".