316215901 has 2 divisors, whose sum is σ = 316215902. Its totient is φ = 316215900.

The previous prime is 316215857. The next prime is 316215919. The reversal of 316215901 is 109512613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187416100 + 128799801 = 13690^2 + 11349^2 .

It is a cyclic number.

It is not a de Polignac number, because 316215901 - 2⁷ = 316215773 is a prime.

It is equal to p_17082055 and since 316215901 and 17082055 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 316215901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316215931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158107950 + 158107951.

It is an arithmetic number, because the mean of its divisors is an integer number (158107951).

Almost surely, 2^316215901 is an apocalyptic number.

It is an amenable number.

316215901 is a deficient number, since it is larger than the sum of its proper divisors (1).

316215901 is an equidigital number, since it uses as much as digits as its factorization.

316215901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 316215901 is about 17782.4604877953. The cubic root of 316215901 is about 681.2835481501.

The spelling of 316215901 in words is "three hundred sixteen million, two hundred fifteen thousand, nine hundred one".