140445470281 has 2 divisors, whose sum is σ = 140445470282. Its totient is φ = 140445470280.

The previous prime is 140445470257. The next prime is 140445470309. The reversal of 140445470281 is 182074544041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134131737600 + 6313732681 = 366240^2 + 79459^2 .

It is a cyclic number.

It is not a de Polignac number, because 140445470281 - 2⁷ = 140445470153 is a prime.

It is a super-2 number, since 2×140445470281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140445470201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70222735140 + 70222735141.

It is an arithmetic number, because the mean of its divisors is an integer number (70222735141).

Almost surely, 2^140445470281 is an apocalyptic number.

It is an amenable number.

140445470281 is a deficient number, since it is larger than the sum of its proper divisors (1).

140445470281 is an equidigital number, since it uses as much as digits as its factorization.

140445470281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 143360, while the sum is 40.

The spelling of 140445470281 in words is "one hundred forty billion, four hundred forty-five million, four hundred seventy thousand, two hundred eighty-one".