318650531 has 2 divisors, whose sum is σ = 318650532. Its totient is φ = 318650530.

The previous prime is 318650509. The next prime is 318650573. The reversal of 318650531 is 135056813.

It is a weak prime.

It is an emirp because it is prime and its reverse (135056813) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318650531 is a prime.

It is a super-2 number, since 2×318650531² = 203076321813163922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (318650131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159325265 + 159325266.

It is an arithmetic number, because the mean of its divisors is an integer number (159325266).

Almost surely, 2^318650531 is an apocalyptic number.

318650531 is a deficient number, since it is larger than the sum of its proper divisors (1).

318650531 is an equidigital number, since it uses as much as digits as its factorization.

318650531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 318650531 is about 17850.7851648044. The cubic root of 318650531 is about 683.0275408036.

The spelling of 318650531 in words is "three hundred eighteen million, six hundred fifty thousand, five hundred thirty-one".