316061521 has 2 divisors, whose sum is σ = 316061522. Its totient is φ = 316061520.

The previous prime is 316061519. The next prime is 316061527. The reversal of 316061521 is 125160613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315453121 + 608400 = 17761^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 316061521 - 2¹ = 316061519 is a prime.

Together with 316061519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (316061527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158030760 + 158030761.

It is an arithmetic number, because the mean of its divisors is an integer number (158030761).

Almost surely, 2^316061521 is an apocalyptic number.

It is an amenable number.

316061521 is a deficient number, since it is larger than the sum of its proper divisors (1).

316061521 is an equidigital number, since it uses as much as digits as its factorization.

316061521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 316061521 is about 17778.1191637361. The cubic root of 316061521 is about 681.1726601201.

The spelling of 316061521 in words is "three hundred sixteen million, sixty-one thousand, five hundred twenty-one".