15233725921 has 16 divisors (see below), whose sum is σ = 15575662080. Its totient is φ = 14895982080.

The previous prime is 15233725919. The next prime is 15233725933. The reversal of 15233725921 is 12952733251.

It is a cyclic number.

It is not a de Polignac number, because 15233725921 - 2¹ = 15233725919 is a prime.

It is a super-2 number, since 2×15233725921² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15233725021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4202916 + ... + 4206538.

It is an arithmetic number, because the mean of its divisors is an integer number (973478880).

Almost surely, 2^15233725921 is an apocalyptic number.

It is an amenable number.

15233725921 is a deficient number, since it is larger than the sum of its proper divisors (341936159).

15233725921 is a wasteful number, since it uses less digits than its factorization.

15233725921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176.

The product of its digits is 113400, while the sum is 40.

The spelling of 15233725921 in words is "fifteen billion, two hundred thirty-three million, seven hundred twenty-five thousand, nine hundred twenty-one".