140223257 has 2 divisors, whose sum is σ = 140223258. Its totient is φ = 140223256.

The previous prime is 140223241. The next prime is 140223263. The reversal of 140223257 is 752322041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135745801 + 4477456 = 11651^2 + 2116^2 .

It is an emirp because it is prime and its reverse (752322041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140223257 - 2⁴ = 140223241 is a prime.

It is not a weakly prime, because it can be changed into another prime (140223227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70111628 + 70111629.

It is an arithmetic number, because the mean of its divisors is an integer number (70111629).

Almost surely, 2^140223257 is an apocalyptic number.

It is an amenable number.

140223257 is a deficient number, since it is larger than the sum of its proper divisors (1).

140223257 is an equidigital number, since it uses as much as digits as its factorization.

140223257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 140223257 is about 11841.5901381529. The cubic root of 140223257 is about 519.5252780374.

Adding to 140223257 its reverse (752322041), we get a palindrome (892545298).

The spelling of 140223257 in words is "one hundred forty million, two hundred twenty-three thousand, two hundred fifty-seven".