15122320513 has 8 divisors (see below), whose sum is σ = 15143858856. Its totient is φ = 15100800000.

The previous prime is 15122320501. The next prime is 15122320517. The reversal of 15122320513 is 31502322151.

It can be written as a sum of positive squares in 4 ways, for example, as 15944049 + 15106376464 = 3993^2 + 122908^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15122320513 - 2⁵ = 15122320481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15122320517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2746263 + ... + 2751763.

It is an arithmetic number, because the mean of its divisors is an integer number (1892982357).

Almost surely, 2^15122320513 is an apocalyptic number.

It is an amenable number.

15122320513 is a deficient number, since it is larger than the sum of its proper divisors (21538343).

15122320513 is a wasteful number, since it uses less digits than its factorization.

15122320513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8915.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 15122320513 its reverse (31502322151), we get a palindrome (46624642664).

The spelling of 15122320513 in words is "fifteen billion, one hundred twenty-two million, three hundred twenty thousand, five hundred thirteen".