312312421 has 4 divisors (see below), whose sum is σ = 312430252. Its totient is φ = 312194592.

The previous prime is 312312419. The next prime is 312312433. The reversal of 312312421 is 124213213.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 309267396 + 3045025 = 17586^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 312312421 - 2¹ = 312312419 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 (312312821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54846 + ... + 60271.

It is an arithmetic number, because the mean of its divisors is an integer number (78107563).

Almost surely, 2^312312421 is an apocalyptic number.

It is an amenable number.

312312421 is a deficient number, since it is larger than the sum of its proper divisors (117831).

312312421 is a wasteful number, since it uses less digits than its factorization.

312312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117830.

The product of its digits is 288, while the sum is 19.

The square root of 312312421 is about 17672.3631979427. The cubic root of 312312421 is about 678.4685989080.

Adding to 312312421 its reverse (124213213), we get a palindrome (436525634).

The spelling of 312312421 in words is "three hundred twelve million, three hundred twelve thousand, four hundred twenty-one".