15297047481 has 4 divisors (see below), whose sum is σ = 20396063312. Its totient is φ = 10198031652.

The previous prime is 15297047477. The next prime is 15297047509. The reversal of 15297047481 is 18474079251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 15297047481 - 2² = 15297047477 is a prime.

It is a super-2 number, since 2×15297047481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15297047481.

It is not an unprimeable number, because it can be changed into a prime (15297047401) 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, 2549507911 + ... + 2549507916.

It is an arithmetic number, because the mean of its divisors is an integer number (5099015828).

Almost surely, 2^15297047481 is an apocalyptic number.

It is an amenable number.

15297047481 is a deficient number, since it is larger than the sum of its proper divisors (5099015831).

15297047481 is an equidigital number, since it uses as much as digits as its factorization.

15297047481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5099015830.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 15297047481 in words is "fifteen billion, two hundred ninety-seven million, forty-seven thousand, four hundred eighty-one".