312443513 has 4 divisors (see below), whose sum is σ = 322522368. Its totient is φ = 302364660.

The previous prime is 312443507. The next prime is 312443539. The reversal of 312443513 is 315344213.

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 312443513 - 2⁴ = 312443497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312443213) 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, 5039381 + ... + 5039442.

It is an arithmetic number, because the mean of its divisors is an integer number (80630592).

Almost surely, 2^312443513 is an apocalyptic number.

It is an amenable number.

312443513 is a deficient number, since it is larger than the sum of its proper divisors (10078855).

312443513 is a wasteful number, since it uses less digits than its factorization.

312443513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10078854.

The product of its digits is 4320, while the sum is 26.

The square root of 312443513 is about 17676.0717638281. The cubic root of 312443513 is about 678.5635138694.

Adding to 312443513 its reverse (315344213), we get a palindrome (627787726).

The spelling of 312443513 in words is "three hundred twelve million, four hundred forty-three thousand, five hundred thirteen".