312253523081 has 2 divisors, whose sum is σ = 312253523082. Its totient is φ = 312253523080.

The previous prime is 312253523047. The next prime is 312253523093. The reversal of 312253523081 is 180325352213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253406526025 + 58846997056 = 503395^2 + 242584^2 .

It is a cyclic number.

It is not a de Polignac number, because 312253523081 - 2¹⁰ = 312253522057 is a prime.

It is a super-2 number, since 2×312253523081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312253520081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156126761540 + 156126761541.

It is an arithmetic number, because the mean of its divisors is an integer number (156126761541).

Almost surely, 2^312253523081 is an apocalyptic number.

It is an amenable number.

312253523081 is a deficient number, since it is larger than the sum of its proper divisors (1).

312253523081 is an equidigital number, since it uses as much as digits as its factorization.

312253523081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 312253523081 its reverse (180325352213), we get a palindrome (492578875294).

The spelling of 312253523081 in words is "three hundred twelve billion, two hundred fifty-three million, five hundred twenty-three thousand, eighty-one".