715521091 has 16 divisors (see below), whose sum is σ = 747325440. Its totient is φ = 684590400.

The previous prime is 715521061. The next prime is 715521181. The reversal of 715521091 is 190125517.

It is a cyclic number.

It is not a de Polignac number, because 715521091 - 2¹⁷ = 715390019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715521061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396391 + ... + 398191.

It is an arithmetic number, because the mean of its divisors is an integer number (46707840).

Almost surely, 2^715521091 is an apocalyptic number.

715521091 is a deficient number, since it is larger than the sum of its proper divisors (31804349).

715521091 is a wasteful number, since it uses less digits than its factorization.

715521091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034.

The product of its (nonzero) digits is 3150, while the sum is 31.

The square root of 715521091 is about 26749.2259888020. The cubic root of 715521091 is about 894.4185818337.

The spelling of 715521091 in words is "seven hundred fifteen million, five hundred twenty-one thousand, ninety-one".