315151891 has 2 divisors, whose sum is σ = 315151892. Its totient is φ = 315151890.

The previous prime is 315151883. The next prime is 315151901. The reversal of 315151891 is 198151513.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315151891 - 2³ = 315151883 is a prime.

It is a super-3 number, since 3×315151891³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (315151801) 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, 157575945 + 157575946.

It is an arithmetic number, because the mean of its divisors is an integer number (157575946).

Almost surely, 2^315151891 is an apocalyptic number.

315151891 is a deficient number, since it is larger than the sum of its proper divisors (1).

315151891 is an equidigital number, since it uses as much as digits as its factorization.

315151891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 34.

The square root of 315151891 is about 17752.5178777547. The cubic root of 315151891 is about 680.5185570226.

The spelling of 315151891 in words is "three hundred fifteen million, one hundred fifty-one thousand, eight hundred ninety-one".