15315280481 has 4 divisors (see below), whose sum is σ = 15315711792. Its totient is φ = 15314849172.

The previous prime is 15315280471. The next prime is 15315280493. The reversal of 15315280481 is 18408251351.

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 a cyclic number.

It is not a de Polignac number, because 15315280481 - 2¹⁸ = 15315018337 is a prime.

It is a super-2 number, since 2×15315280481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15315280471) 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, 157091 + ... + 235176.

It is an arithmetic number, because the mean of its divisors is an integer number (3828927948).

Almost surely, 2^15315280481 is an apocalyptic number.

It is an amenable number.

15315280481 is a deficient number, since it is larger than the sum of its proper divisors (431311).

15315280481 is an equidigital number, since it uses as much as digits as its factorization.

15315280481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431310.

The product of its (nonzero) digits is 38400, while the sum is 38.

The spelling of 15315280481 in words is "fifteen billion, three hundred fifteen million, two hundred eighty thousand, four hundred eighty-one".