440242023451 has 2 divisors, whose sum is σ = 440242023452. Its totient is φ = 440242023450.

The previous prime is 440242023349. The next prime is 440242023467. The reversal of 440242023451 is 154320242044.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 440242023451 - 2¹⁹ = 440241499163 is a prime.

It is not a weakly prime, because it can be changed into another prime (440242053451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220121011725 + 220121011726.

It is an arithmetic number, because the mean of its divisors is an integer number (220121011726).

Almost surely, 2^440242023451 is an apocalyptic number.

440242023451 is a deficient number, since it is larger than the sum of its proper divisors (1).

440242023451 is an equidigital number, since it uses as much as digits as its factorization.

440242023451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 440242023451 its reverse (154320242044), we get a palindrome (594562265495).

The spelling of 440242023451 in words is "four hundred forty billion, two hundred forty-two million, twenty-three thousand, four hundred fifty-one".