315321403 has 4 divisors (see below), whose sum is σ = 318268440. Its totient is φ = 312374368.

The previous prime is 315321373. The next prime is 315321431. The reversal of 315321403 is 304123513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 315321403 - 2¹³ = 315313211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315321493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1473358 + ... + 1473571.

It is an arithmetic number, because the mean of its divisors is an integer number (79567110).

Almost surely, 2^315321403 is an apocalyptic number.

315321403 is a deficient number, since it is larger than the sum of its proper divisors (2947037).

315321403 is a wasteful number, since it uses less digits than its factorization.

315321403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947036.

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

The square root of 315321403 is about 17757.2915446022. The cubic root of 315321403 is about 680.6405462271.

Adding to 315321403 its reverse (304123513), we get a palindrome (619444916).

The spelling of 315321403 in words is "three hundred fifteen million, three hundred twenty-one thousand, four hundred three".