716531 has 2 divisors, whose sum is σ = 716532. Its totient is φ = 716530.

The previous prime is 716501. The next prime is 716543. The reversal of 716531 is 135617.

It is a strong prime.

It is an emirp because it is prime and its reverse (135617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 716531 - 2¹⁸ = 454387 is a prime.

It is a super-2 number, since 2×716531² = 1026833347922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 716497 and 716506.

It is not a weakly prime, because it can be changed into another prime (716501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358265 + 358266.

It is an arithmetic number, because the mean of its divisors is an integer number (358266).

2⁷¹⁶⁵³¹ is an apocalyptic number.

716531 is a deficient number, since it is larger than the sum of its proper divisors (1).

716531 is an equidigital number, since it uses as much as digits as its factorization.

716531 is an evil number, because the sum of its binary digits is even.

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

The square root of 716531 is about 846.4815414408. The cubic root of 716531 is about 89.4839187528.

The spelling of 716531 in words is "seven hundred sixteen thousand, five hundred thirty-one".