312421503 has 16 divisors (see below), whose sum is σ = 452633600. Its totient is φ = 190952640.

The previous prime is 312421453. The next prime is 312421511. The reversal of 312421503 is 305124213.

It is not a de Polignac number, because 312421503 - 2⁸ = 312421247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312421503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312421003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86638 + ... + 90171.

It is an arithmetic number, because the mean of its divisors is an integer number (28289600).

Almost surely, 2^312421503 is an apocalyptic number.

312421503 is a deficient number, since it is larger than the sum of its proper divisors (140212097).

312421503 is a wasteful number, since it uses less digits than its factorization.

312421503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176862.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 312421503 is about 17675.4491597809. The cubic root of 312421503 is about 678.5475797533.

Adding to 312421503 its reverse (305124213), we get a palindrome (617545716).

The spelling of 312421503 in words is "three hundred twelve million, four hundred twenty-one thousand, five hundred three".