318561461 has 2 divisors, whose sum is σ = 318561462. Its totient is φ = 318561460.

The previous prime is 318561437. The next prime is 318561493. The reversal of 318561461 is 164165813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296046436 + 22515025 = 17206^2 + 4745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318561461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318561401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159280730 + 159280731.

It is an arithmetic number, because the mean of its divisors is an integer number (159280731).

Almost surely, 2^318561461 is an apocalyptic number.

It is an amenable number.

318561461 is a deficient number, since it is larger than the sum of its proper divisors (1).

318561461 is an equidigital number, since it uses as much as digits as its factorization.

318561461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 318561461 is about 17848.2901421957. The cubic root of 318561461 is about 682.9638943462.

It can be divided in two parts, 3185 and 61461, that added together give a palindrome (64646).

The spelling of 318561461 in words is "three hundred eighteen million, five hundred sixty-one thousand, four hundred sixty-one".