315231061 has 2 divisors, whose sum is σ = 315231062. Its totient is φ = 315231060.

The previous prime is 315231053. The next prime is 315231097. The reversal of 315231061 is 160132513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271260900 + 43970161 = 16470^2 + 6631^2 .

It is a cyclic number.

It is not a de Polignac number, because 315231061 - 2³ = 315231053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315231461) 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, 157615530 + 157615531.

It is an arithmetic number, because the mean of its divisors is an integer number (157615531).

Almost surely, 2^315231061 is an apocalyptic number.

It is an amenable number.

315231061 is a deficient number, since it is larger than the sum of its proper divisors (1).

315231061 is an equidigital number, since it uses as much as digits as its factorization.

315231061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 315231061 is about 17754.7475622719. The cubic root of 315231061 is about 680.5755371062.

Adding to 315231061 its reverse (160132513), we get a palindrome (475363574).

The spelling of 315231061 in words is "three hundred fifteen million, two hundred thirty-one thousand, sixty-one".