251240530319 has 2 divisors, whose sum is σ = 251240530320. Its totient is φ = 251240530318.

The previous prime is 251240530313. The next prime is 251240530357. The reversal of 251240530319 is 913035042152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251240530319 - 2¹² = 251240526223 is a prime.

It is a super-2 number, since 2×251240530319² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251240530313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125620265159 + 125620265160.

It is an arithmetic number, because the mean of its divisors is an integer number (125620265160).

Almost surely, 2^251240530319 is an apocalyptic number.

251240530319 is a deficient number, since it is larger than the sum of its proper divisors (1).

251240530319 is an equidigital number, since it uses as much as digits as its factorization.

251240530319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 251240530319 in words is "two hundred fifty-one billion, two hundred forty million, five hundred thirty thousand, three hundred nineteen".