312540521333 has 4 divisors (see below), whose sum is σ = 330925257900. Its totient is φ = 294155784768.

The previous prime is 312540521311. The next prime is 312540521341. The reversal of 312540521333 is 333125045213.

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 182437474129 + 130103047204 = 427127^2 + 360698^2 .

It is a cyclic number.

It is not a de Polignac number, because 312540521333 - 2¹⁴ = 312540504949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312540521333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312540521633) 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, 9192368258 + ... + 9192368291.

It is an arithmetic number, because the mean of its divisors is an integer number (82731314475).

Almost surely, 2^312540521333 is an apocalyptic number.

It is an amenable number.

312540521333 is a deficient number, since it is larger than the sum of its proper divisors (18384736567).

312540521333 is a wasteful number, since it uses less digits than its factorization.

312540521333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18384736566.

The product of its (nonzero) digits is 32400, while the sum is 32.

Adding to 312540521333 its reverse (333125045213), we get a palindrome (645665566546).

The spelling of 312540521333 in words is "three hundred twelve billion, five hundred forty million, five hundred twenty-one thousand, three hundred thirty-three".