715831 has 4 divisors (see below), whose sum is σ = 718432.
Its totient is φ = 713232.
The previous prime is 715823. The next prime is 715843. The reversal of 715831 is 138517.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 715831 - 23 = 715823 is a prime.
It is a super-2 number, since 2×7158312 = 1024828041122, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 715796 and 715805.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (715801) 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, 831 + ... + 1456.
It is an arithmetic number, because the mean of its divisors is an integer number (179608).
2715831 is an apocalyptic number.
715831 is a deficient number, since it is larger than the sum of its proper divisors (2601).
715831 is a wasteful number, since it uses less digits than its factorization.
715831 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2600.
The product of its digits is 840, while the sum is 25.
The square root of 715831 is about 846.0679641731.
The cubic root of 715831 is about 89.4547694431.
Subtracting from 715831 its sum of digits (25), we obtain a triangular number (715806 = T1196).
The spelling of 715831 in words is "seven hundred fifteen thousand, eight hundred thirty-one".