15621221151313 has 8 divisors (see below), whose sum is σ = 15635154186176. Its totient is φ = 15607290956400.

The previous prime is 15621221151241. The next prime is 15621221151407. The reversal of 15621221151313 is 31315112212651.

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 15621221151313 - 2²⁹ = 15620684280401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15621221151113) 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, 10373020 + ... + 11783122.

It is an arithmetic number, because the mean of its divisors is an integer number (1954394273272).

Almost surely, 2^{15621221151313} is an apocalyptic number.

It is an amenable number.

15621221151313 is a deficient number, since it is larger than the sum of its proper divisors (13933034863).

15621221151313 is a wasteful number, since it uses less digits than its factorization.

15621221151313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419975.

The product of its digits is 10800, while the sum is 34.

Adding to 15621221151313 its reverse (31315112212651), we get a palindrome (46936333363964).

The spelling of 15621221151313 in words is "fifteen trillion, six hundred twenty-one billion, two hundred twenty-one million, one hundred fifty-one thousand, three hundred thirteen".