315198101 has 2 divisors, whose sum is σ = 315198102. Its totient is φ = 315198100.

The previous prime is 315198077. The next prime is 315198131. The reversal of 315198101 is 101891513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249166225 + 66031876 = 15785^2 + 8126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315198101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315198131) 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, 157599050 + 157599051.

It is an arithmetic number, because the mean of its divisors is an integer number (157599051).

Almost surely, 2^315198101 is an apocalyptic number.

It is an amenable number.

315198101 is a deficient number, since it is larger than the sum of its proper divisors (1).

315198101 is an equidigital number, since it uses as much as digits as its factorization.

315198101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 315198101 is about 17753.8193355683. The cubic root of 315198101 is about 680.5518163562.

The spelling of 315198101 in words is "three hundred fifteen million, one hundred ninety-eight thousand, one hundred one".