312430135535321 has 16 divisors (see below), whose sum is σ = 313853575960848. Its totient is φ = 311007772108800.

The previous prime is 312430135535269. The next prime is 312430135535351. The reversal of 312430135535321 is 123535531034213.

It can be written as a sum of positive squares in 8 ways, for example, as 69785306137600 + 242644829397721 = 8353760^2 + 15577061^2 .

It is a cyclic number.

It is not a de Polignac number, because 312430135535321 - 2⁴² = 308032089024217 is a prime.

It is a super-2 number, since 2×312430135535321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312430135535351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6897955751 + ... + 6898001043.

It is an arithmetic number, because the mean of its divisors is an integer number (19615848497553).

Almost surely, 2^{312430135535321} is an apocalyptic number.

It is an amenable number.

312430135535321 is a deficient number, since it is larger than the sum of its proper divisors (1423440425527).

312430135535321 is a wasteful number, since it uses less digits than its factorization.

312430135535321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56492.

The product of its (nonzero) digits is 486000, while the sum is 41.

Adding to 312430135535321 its reverse (123535531034213), we get a palindrome (435965666569534).

The spelling of 312430135535321 in words is "three hundred twelve trillion, four hundred thirty billion, one hundred thirty-five million, five hundred thirty-five thousand, three hundred twenty-one".