312251561208403 has 2 divisors, whose sum is σ = 312251561208404. Its totient is φ = 312251561208402.

The previous prime is 312251561208371. The next prime is 312251561208437. The reversal of 312251561208403 is 304802165152213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312251561208403 - 2⁵ = 312251561208371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312251561208403.

It is not a weakly prime, because it can be changed into another prime (312251561208803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156125780604201 + 156125780604202.

It is an arithmetic number, because the mean of its divisors is an integer number (156125780604202).

Almost surely, 2^{312251561208403} is an apocalyptic number.

312251561208403 is a deficient number, since it is larger than the sum of its proper divisors (1).

312251561208403 is an equidigital number, since it uses as much as digits as its factorization.

312251561208403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 312251561208403 in words is "three hundred twelve trillion, two hundred fifty-one billion, five hundred sixty-one million, two hundred eight thousand, four hundred three".