251351220545323 has 2 divisors, whose sum is σ = 251351220545324. Its totient is φ = 251351220545322.

The previous prime is 251351220545311. The next prime is 251351220545377. The reversal of 251351220545323 is 323545022153152.

251351220545323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251351220545323 - 2⁹ = 251351220544811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251351220545323.

It is not a weakly prime, because it can be changed into another prime (251351220545303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125675610272661 + 125675610272662.

It is an arithmetic number, because the mean of its divisors is an integer number (125675610272662).

Almost surely, 2^{251351220545323} is an apocalyptic number.

251351220545323 is a deficient number, since it is larger than the sum of its proper divisors (1).

251351220545323 is an equidigital number, since it uses as much as digits as its factorization.

251351220545323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080000, while the sum is 43.

Adding to 251351220545323 its reverse (323545022153152), we get a palindrome (574896242698475).

The spelling of 251351220545323 in words is "two hundred fifty-one trillion, three hundred fifty-one billion, two hundred twenty million, five hundred forty-five thousand, three hundred twenty-three".