251035342643 has 2 divisors, whose sum is σ = 251035342644. Its totient is φ = 251035342642.

The previous prime is 251035342633. The next prime is 251035342651. The reversal of 251035342643 is 346243530152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251035342643 - 2¹⁶ = 251035277107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251035342597 and 251035342606.

It is not a weakly prime, because it can be changed into another prime (251035342633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125517671321 + 125517671322.

It is an arithmetic number, because the mean of its divisors is an integer number (125517671322).

Almost surely, 2^251035342643 is an apocalyptic number.

251035342643 is a deficient number, since it is larger than the sum of its proper divisors (1).

251035342643 is an equidigital number, since it uses as much as digits as its factorization.

251035342643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 251035342643 its reverse (346243530152), we get a palindrome (597278872795).

The spelling of 251035342643 in words is "two hundred fifty-one billion, thirty-five million, three hundred forty-two thousand, six hundred forty-three".