315206431 has 2 divisors, whose sum is σ = 315206432. Its totient is φ = 315206430.

The previous prime is 315206413. The next prime is 315206453. The reversal of 315206431 is 134602513.

Together with previous prime (315206413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315206431 - 2¹⁹ = 314682143 is a prime.

It is a super-2 number, since 2×315206431² = 198710188287515522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 315206396 and 315206405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315206491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157603215 + 157603216.

It is an arithmetic number, because the mean of its divisors is an integer number (157603216).

Almost surely, 2^315206431 is an apocalyptic number.

315206431 is a deficient number, since it is larger than the sum of its proper divisors (1).

315206431 is an equidigital number, since it uses as much as digits as its factorization.

315206431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 315206431 is about 17754.0539314265. The cubic root of 315206431 is about 680.5578114713.

Adding to 315206431 its reverse (134602513), we get a palindrome (449808944).

The spelling of 315206431 in words is "three hundred fifteen million, two hundred six thousand, four hundred thirty-one".