715631 has 4 divisors (see below), whose sum is σ = 817872. Its totient is φ = 613392.

The previous prime is 715621. The next prime is 715639. The reversal of 715631 is 136517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136517 = 211 ⋅647.

It is a cyclic number.

It is not a de Polignac number, because 715631 - 2⁶ = 715567 is a prime.

It is a super-2 number, since 2×715631² = 1024255456322, 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 = 715597 and 715606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (715639) 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, 51110 + ... + 51123.

It is an arithmetic number, because the mean of its divisors is an integer number (204468).

2⁷¹⁵⁶³¹ is an apocalyptic number.

715631 is a deficient number, since it is larger than the sum of its proper divisors (102241).

715631 is a wasteful number, since it uses less digits than its factorization.

715631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102240.

The product of its digits is 630, while the sum is 23.

The square root of 715631 is about 845.9497621017. The cubic root of 715631 is about 89.4464375787.

The spelling of 715631 in words is "seven hundred fifteen thousand, six hundred thirty-one".