251415240001 has 2 divisors, whose sum is σ = 251415240002. Its totient is φ = 251415240000.

The previous prime is 251415239989. The next prime is 251415240017. The reversal of 251415240001 is 100042514152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201049108225 + 50366131776 = 448385^2 + 224424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251415240001 is a prime.

It is not a weakly prime, because it can be changed into another prime (251415240071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125707620000 + 125707620001.

It is an arithmetic number, because the mean of its divisors is an integer number (125707620001).

Almost surely, 2^251415240001 is an apocalyptic number.

It is an amenable number.

251415240001 is a deficient number, since it is larger than the sum of its proper divisors (1).

251415240001 is an equidigital number, since it uses as much as digits as its factorization.

251415240001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 251415240001 its reverse (100042514152), we get a palindrome (351457754153).

The spelling of 251415240001 in words is "two hundred fifty-one billion, four hundred fifteen million, two hundred forty thousand, one".