312345133 has 2 divisors, whose sum is σ = 312345134. Its totient is φ = 312345132.

The previous prime is 312345107. The next prime is 312345139. The reversal of 312345133 is 331543213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277322409 + 35022724 = 16653^2 + 5918^2 .

It is a cyclic number.

It is not a de Polignac number, because 312345133 - 2²¹ = 310247981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312345098 and 312345107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312345139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156172566 + 156172567.

It is an arithmetic number, because the mean of its divisors is an integer number (156172567).

Almost surely, 2^312345133 is an apocalyptic number.

It is an amenable number.

312345133 is a deficient number, since it is larger than the sum of its proper divisors (1).

312345133 is an equidigital number, since it uses as much as digits as its factorization.

312345133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 25.

The square root of 312345133 is about 17673.2886866027. The cubic root of 312345133 is about 678.4922859689.

Adding to 312345133 its reverse (331543213), we get a palindrome (643888346).

The spelling of 312345133 in words is "three hundred twelve million, three hundred forty-five thousand, one hundred thirty-three".