315235729 has 2 divisors, whose sum is σ = 315235730. Its totient is φ = 315235728.

The previous prime is 315235663. The next prime is 315235763. The reversal of 315235729 is 927532513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310570129 + 4665600 = 17623^2 + 2160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315235729 is a prime.

It is a super-2 number, since 2×315235729² = 198747129676322882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315235799) 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, 157617864 + 157617865.

It is an arithmetic number, because the mean of its divisors is an integer number (157617865).

Almost surely, 2^315235729 is an apocalyptic number.

It is an amenable number.

315235729 is a deficient number, since it is larger than the sum of its proper divisors (1).

315235729 is an equidigital number, since it uses as much as digits as its factorization.

315235729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 315235729 is about 17754.8790195822. The cubic root of 315235729 is about 680.5788964525.

The spelling of 315235729 in words is "three hundred fifteen million, two hundred thirty-five thousand, seven hundred twenty-nine".