315101231 has 2 divisors, whose sum is σ = 315101232. Its totient is φ = 315101230.

The previous prime is 315101221. The next prime is 315101251. The reversal of 315101231 is 132101513.

It is a weak prime.

It is an emirp because it is prime and its reverse (132101513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315101231 - 2⁶ = 315101167 is a prime.

It is a super-2 number, since 2×315101231² = 198577571555430722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315101221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157550615 + 157550616.

It is an arithmetic number, because the mean of its divisors is an integer number (157550616).

Almost surely, 2^315101231 is an apocalyptic number.

315101231 is a deficient number, since it is larger than the sum of its proper divisors (1).

315101231 is an equidigital number, since it uses as much as digits as its factorization.

315101231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 315101231 is about 17751.0909805567. The cubic root of 315101231 is about 680.4820910956.

Adding to 315101231 its reverse (132101513), we get a palindrome (447202744).

The spelling of 315101231 in words is "three hundred fifteen million, one hundred one thousand, two hundred thirty-one".