15317900888481 has 9 divisors (see below), whose sum is σ = 22125873798769. Its totient is φ = 10211926098036.

The previous prime is 15317900888473. The next prime is 15317900888501. The reversal of 15317900888481 is 18488800971351.

The square root of 15317900888481 is 3913809.

It is a perfect power (a square), and thus also a powerful number.

15317900888481 is a `hidden beast` number, since 1 + 5 + 3 + 1 + 79 + 0 + 0 + 8 + 88 + 481 = 666.

15317900888481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 15317900888481 - 2³ = 15317900888473 is a prime.

It is a super-2 number, since 2×15317900888481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15317900888431) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11089126 + ... + 12393728.

Almost surely, 2^{15317900888481} is an apocalyptic number.

15317900888481 is the 3913809-th square number.

15317900888481 is the 1956905-th centered octagonal number.

It is an amenable number.

15317900888481 is a deficient number, since it is larger than the sum of its proper divisors (6807972910288).

15317900888481 is an frugal number, since it uses more digits than its factorization.

15317900888481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609212 (or 1304606 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 63.

The spelling of 15317900888481 in words is "fifteen trillion, three hundred seventeen billion, nine hundred million, eight hundred eighty-eight thousand, four hundred eighty-one".