313145503 has 4 divisors (see below), whose sum is σ = 341613288. Its totient is φ = 284677720.

The previous prime is 313145447. The next prime is 313145507. The reversal of 313145503 is 305541313.

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 313145503 - 2¹⁷ = 313014431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313145507) 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, 14233876 + ... + 14233897.

It is an arithmetic number, because the mean of its divisors is an integer number (85403322).

Almost surely, 2^313145503 is an apocalyptic number.

313145503 is a deficient number, since it is larger than the sum of its proper divisors (28467785).

313145503 is a wasteful number, since it uses less digits than its factorization.

313145503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28467784.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 313145503 is about 17695.9176930726. The cubic root of 313145503 is about 679.0713267268.

Adding to 313145503 its reverse (305541313), we get a palindrome (618686816).

The spelling of 313145503 in words is "three hundred thirteen million, one hundred forty-five thousand, five hundred three".