440223257 has 2 divisors, whose sum is σ = 440223258. Its totient is φ = 440223256.

The previous prime is 440223227. The next prime is 440223263. The reversal of 440223257 is 752322044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438316096 + 1907161 = 20936^2 + 1381^2 .

It is a cyclic number.

It is not a de Polignac number, because 440223257 - 2⁸ = 440223001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (440223227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220111628 + 220111629.

It is an arithmetic number, because the mean of its divisors is an integer number (220111629).

Almost surely, 2^440223257 is an apocalyptic number.

It is an amenable number.

440223257 is a deficient number, since it is larger than the sum of its proper divisors (1).

440223257 is an equidigital number, since it uses as much as digits as its factorization.

440223257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 440223257 is about 20981.4979684483. The cubic root of 440223257 is about 760.7191121821.

The spelling of 440223257 in words is "four hundred forty million, two hundred twenty-three thousand, two hundred fifty-seven".