251240453293 has 2 divisors, whose sum is σ = 251240453294. Its totient is φ = 251240453292.

The previous prime is 251240453239. The next prime is 251240453357. The reversal of 251240453293 is 392354042152.

Together with previous prime (251240453239) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246991108324 + 4249344969 = 496982^2 + 65187^2 .

It is a cyclic number.

It is not a de Polignac number, because 251240453293 - 2³³ = 242650518701 is a prime.

It is a super-2 number, since 2×251240453293² (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 (251240453393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125620226646 + 125620226647.

It is an arithmetic number, because the mean of its divisors is an integer number (125620226647).

Almost surely, 2^251240453293 is an apocalyptic number.

It is an amenable number.

251240453293 is a deficient number, since it is larger than the sum of its proper divisors (1).

251240453293 is an equidigital number, since it uses as much as digits as its factorization.

251240453293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 251240453293 in words is "two hundred fifty-one billion, two hundred forty million, four hundred fifty-three thousand, two hundred ninety-three".