251264426603 has 2 divisors, whose sum is σ = 251264426604. Its totient is φ = 251264426602.

The previous prime is 251264426593. The next prime is 251264426629. The reversal of 251264426603 is 306624462152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251264426603 - 2¹⁶ = 251264361067 is a prime.

It is a super-2 number, since 2×251264426603² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (251264426663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125632213301 + 125632213302.

It is an arithmetic number, because the mean of its divisors is an integer number (125632213302).

Almost surely, 2^251264426603 is an apocalyptic number.

251264426603 is a deficient number, since it is larger than the sum of its proper divisors (1).

251264426603 is an equidigital number, since it uses as much as digits as its factorization.

251264426603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 251264426603 its reverse (306624462152), we get a palindrome (557888888755).

The spelling of 251264426603 in words is "two hundred fifty-one billion, two hundred sixty-four million, four hundred twenty-six thousand, six hundred three".