316051781 has 2 divisors, whose sum is σ = 316051782. Its totient is φ = 316051780.

The previous prime is 316051751. The next prime is 316051793. The reversal of 316051781 is 187150613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294808900 + 21242881 = 17170^2 + 4609^2 .

It is a cyclic number.

It is not a de Polignac number, because 316051781 - 2¹⁴ = 316035397 is a prime.

It is a super-2 number, since 2×316051781² = 199777456546543922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316051751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158025890 + 158025891.

It is an arithmetic number, because the mean of its divisors is an integer number (158025891).

Almost surely, 2^316051781 is an apocalyptic number.

It is an amenable number.

316051781 is a deficient number, since it is larger than the sum of its proper divisors (1).

316051781 is an equidigital number, since it uses as much as digits as its factorization.

316051781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 316051781 is about 17777.8452293859. The cubic root of 316051781 is about 681.1656628644.

The spelling of 316051781 in words is "three hundred sixteen million, fifty-one thousand, seven hundred eighty-one".