312315403 has 2 divisors, whose sum is σ = 312315404. Its totient is φ = 312315402.

The previous prime is 312315391. The next prime is 312315427. The reversal of 312315403 is 304513213.

It is a weak prime.

It is an emirp because it is prime and its reverse (304513213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312315403 is a prime.

It is not a weakly prime, because it can be changed into another prime (312315433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156157701 + 156157702.

It is an arithmetic number, because the mean of its divisors is an integer number (156157702).

Almost surely, 2^312315403 is an apocalyptic number.

312315403 is a deficient number, since it is larger than the sum of its proper divisors (1).

312315403 is an equidigital number, since it uses as much as digits as its factorization.

312315403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 312315403 is about 17672.4475667634. The cubic root of 312315403 is about 678.4707582703.

Adding to 312315403 its reverse (304513213), we get a palindrome (616828616).

The spelling of 312315403 in words is "three hundred twelve million, three hundred fifteen thousand, four hundred three".