15323053121 has 4 divisors (see below), whose sum is σ = 15463631700. Its totient is φ = 15182474544.

The previous prime is 15323053117. The next prime is 15323053157. The reversal of 15323053121 is 12135032351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12135032351 = 13 ⋅933464027.

It can be written as a sum of positive squares in 2 ways, for example, as 3564687025 + 11758366096 = 59705^2 + 108436^2 .

It is a cyclic number.

It is not a de Polignac number, because 15323053121 - 2² = 15323053117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15323056121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70289126 + ... + 70289343.

It is an arithmetic number, because the mean of its divisors is an integer number (3865907925).

Almost surely, 2^15323053121 is an apocalyptic number.

It is an amenable number.

15323053121 is a deficient number, since it is larger than the sum of its proper divisors (140578579).

15323053121 is a wasteful number, since it uses less digits than its factorization.

15323053121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140578578.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 15323053121 its reverse (12135032351), we get a palindrome (27458085472).

The spelling of 15323053121 in words is "fifteen billion, three hundred twenty-three million, fifty-three thousand, one hundred twenty-one".