251341423049 has 2 divisors, whose sum is σ = 251341423050. Its totient is φ = 251341423048.

The previous prime is 251341423019. The next prime is 251341423063. The reversal of 251341423049 is 940324143152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146196875449 + 105144547600 = 382357^2 + 324260^2 .

It is a cyclic number.

It is not a de Polignac number, because 251341423049 - 2³² = 247046455753 is a prime.

It is not a weakly prime, because it can be changed into another prime (251341423019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125670711524 + 125670711525.

It is an arithmetic number, because the mean of its divisors is an integer number (125670711525).

Almost surely, 2^251341423049 is an apocalyptic number.

It is an amenable number.

251341423049 is a deficient number, since it is larger than the sum of its proper divisors (1).

251341423049 is an equidigital number, since it uses as much as digits as its factorization.

251341423049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 251341423049 in words is "two hundred fifty-one billion, three hundred forty-one million, four hundred twenty-three thousand, forty-nine".