715331561 has 4 divisors (see below), whose sum is σ = 817521792. Its totient is φ = 613141332.

The previous prime is 715331549. The next prime is 715331563. The reversal of 715331561 is 165133517.

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 715331561 - 2⁶ = 715331497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715331563) 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, 51095105 + ... + 51095118.

It is an arithmetic number, because the mean of its divisors is an integer number (204380448).

Almost surely, 2^715331561 is an apocalyptic number.

It is an amenable number.

715331561 is a deficient number, since it is larger than the sum of its proper divisors (102190231).

715331561 is a wasteful number, since it uses less digits than its factorization.

715331561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102190230.

The product of its digits is 9450, while the sum is 32.

The square root of 715331561 is about 26745.6830348376. The cubic root of 715331561 is about 894.3396025063.

The spelling of 715331561 in words is "seven hundred fifteen million, three hundred thirty-one thousand, five hundred sixty-one".