312423521 has 4 divisors (see below), whose sum is σ = 312548544. Its totient is φ = 312298500.

The previous prime is 312423497. The next prime is 312423533. The reversal of 312423521 is 125324213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312423521 - 2⁶ = 312423457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312423541) 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, 58685 + ... + 63786.

It is an arithmetic number, because the mean of its divisors is an integer number (78137136).

Almost surely, 2^312423521 is an apocalyptic number.

It is an amenable number.

312423521 is a deficient number, since it is larger than the sum of its proper divisors (125023).

312423521 is a wasteful number, since it uses less digits than its factorization.

312423521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125022.

The product of its digits is 1440, while the sum is 23.

The square root of 312423521 is about 17675.5062445181. The cubic root of 312423521 is about 678.5490407134.

Adding to 312423521 its reverse (125324213), we get a palindrome (437747734).

The spelling of 312423521 in words is "three hundred twelve million, four hundred twenty-three thousand, five hundred twenty-one".