312421133 has 4 divisors (see below), whose sum is σ = 312533568. Its totient is φ = 312308700.

The previous prime is 312421129. The next prime is 312421163. The reversal of 312421133 is 331124213.

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 312421133 - 2² = 312421129 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 (312421163) 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, 51941 + ... + 57642.

It is an arithmetic number, because the mean of its divisors is an integer number (78133392).

Almost surely, 2^312421133 is an apocalyptic number.

It is an amenable number.

312421133 is a deficient number, since it is larger than the sum of its proper divisors (112435).

312421133 is a wasteful number, since it uses less digits than its factorization.

312421133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112434.

The product of its digits is 432, while the sum is 20.

The square root of 312421133 is about 17675.4386932828. The cubic root of 312421133 is about 678.5473118858.

Adding to 312421133 its reverse (331124213), we get a palindrome (643545346).

The spelling of 312421133 in words is "three hundred twelve million, four hundred twenty-one thousand, one hundred thirty-three".