715505731 has 4 divisors (see below), whose sum is σ = 715582512. Its totient is φ = 715428952.

The previous prime is 715505711. The next prime is 715505753. The reversal of 715505731 is 137505517.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 715505731 - 2¹³ = 715497539 is a prime.

It is a super-2 number, since 2×715505731² = 1023896902187688722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715505701) 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, 22111 + ... + 43816.

It is an arithmetic number, because the mean of its divisors is an integer number (178895628).

Almost surely, 2^715505731 is an apocalyptic number.

715505731 is a deficient number, since it is larger than the sum of its proper divisors (76781).

715505731 is a wasteful number, since it uses less digits than its factorization.

715505731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76780.

The product of its (nonzero) digits is 18375, while the sum is 34.

The square root of 715505731 is about 26748.9388761498. The cubic root of 715505731 is about 894.4121816647.

The spelling of 715505731 in words is "seven hundred fifteen million, five hundred five thousand, seven hundred thirty-one".