312005212451 has 4 divisors (see below), whose sum is σ = 315954645600. Its totient is φ = 308055779304.

The previous prime is 312005212417. The next prime is 312005212457. The reversal of 312005212451 is 154212500213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312005212451 - 2¹⁴ = 312005196067 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 312005212451.

It is not an unprimeable number, because it can be changed into a prime (312005212457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1974716456 + ... + 1974716613.

It is an arithmetic number, because the mean of its divisors is an integer number (78988661400).

Almost surely, 2^312005212451 is an apocalyptic number.

312005212451 is a deficient number, since it is larger than the sum of its proper divisors (3949433149).

312005212451 is an equidigital number, since it uses as much as digits as its factorization.

312005212451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949433148.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 312005212451 its reverse (154212500213), we get a palindrome (466217712664).

The spelling of 312005212451 in words is "three hundred twelve billion, five million, two hundred twelve thousand, four hundred fifty-one".