251222341387 has 2 divisors, whose sum is σ = 251222341388. Its totient is φ = 251222341386.

The previous prime is 251222341309. The next prime is 251222341417. The reversal of 251222341387 is 783143222152.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251222341387 is a prime.

It is a super-2 number, since 2×251222341387² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (251222341687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125611170693 + 125611170694.

It is an arithmetic number, because the mean of its divisors is an integer number (125611170694).

Almost surely, 2^251222341387 is an apocalyptic number.

251222341387 is a deficient number, since it is larger than the sum of its proper divisors (1).

251222341387 is an equidigital number, since it uses as much as digits as its factorization.

251222341387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 40.

The spelling of 251222341387 in words is "two hundred fifty-one billion, two hundred twenty-two million, three hundred forty-one thousand, three hundred eighty-seven".