140340420251 has 2 divisors, whose sum is σ = 140340420252. Its totient is φ = 140340420250.

The previous prime is 140340420197. The next prime is 140340420281. The reversal of 140340420251 is 152024043041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140340420251 - 2³⁰ = 139266678427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140340420251.

It is not a weakly prime, because it can be changed into another prime (140340420281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70170210125 + 70170210126.

It is an arithmetic number, because the mean of its divisors is an integer number (70170210126).

Almost surely, 2^140340420251 is an apocalyptic number.

140340420251 is a deficient number, since it is larger than the sum of its proper divisors (1).

140340420251 is an equidigital number, since it uses as much as digits as its factorization.

140340420251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 140340420251 its reverse (152024043041), we get a palindrome (292364463292).

The spelling of 140340420251 in words is "one hundred forty billion, three hundred forty million, four hundred twenty thousand, two hundred fifty-one".