140305349281 has 2 divisors, whose sum is σ = 140305349282. Its totient is φ = 140305349280.

The previous prime is 140305349221. The next prime is 140305349287. The reversal of 140305349281 is 182943503041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139813175056 + 492174225 = 373916^2 + 22185^2 .

It is a cyclic number.

It is not a de Polignac number, because 140305349281 - 2¹⁵ = 140305316513 is a prime.

It is a super-2 number, since 2×140305349281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140305349287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70152674640 + 70152674641.

It is an arithmetic number, because the mean of its divisors is an integer number (70152674641).

Almost surely, 2^140305349281 is an apocalyptic number.

It is an amenable number.

140305349281 is a deficient number, since it is larger than the sum of its proper divisors (1).

140305349281 is an equidigital number, since it uses as much as digits as its factorization.

140305349281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 140305349281 in words is "one hundred forty billion, three hundred five million, three hundred forty-nine thousand, two hundred eighty-one".