251041345747 has 2 divisors, whose sum is σ = 251041345748. Its totient is φ = 251041345746.

The previous prime is 251041345739. The next prime is 251041345811. The reversal of 251041345747 is 747543140152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251041345747 - 2³ = 251041345739 is a prime.

It is not a weakly prime, because it can be changed into another prime (251041345147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125520672873 + 125520672874.

It is an arithmetic number, because the mean of its divisors is an integer number (125520672874).

Almost surely, 2^251041345747 is an apocalyptic number.

251041345747 is a deficient number, since it is larger than the sum of its proper divisors (1).

251041345747 is an equidigital number, since it uses as much as digits as its factorization.

251041345747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 470400, while the sum is 43.

Adding to 251041345747 its reverse (747543140152), we get a palindrome (998584485899).

The spelling of 251041345747 in words is "two hundred fifty-one billion, forty-one million, three hundred forty-five thousand, seven hundred forty-seven".