440551 has 2 divisors, whose sum is σ = 440552. Its totient is φ = 440550.

The previous prime is 440549. The next prime is 440567. The reversal of 440551 is 155044.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 440551 - 2¹ = 440549 is a prime.

Together with 440549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220275 + 220276.

It is an arithmetic number, because the mean of its divisors is an integer number (220276).

2⁴⁴⁰⁵⁵¹ is an apocalyptic number.

440551 is a deficient number, since it is larger than the sum of its proper divisors (1).

440551 is an equidigital number, since it uses as much as digits as its factorization.

440551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 440551 is about 663.7401600024. The cubic root of 440551 is about 76.0907848627.

Adding to 440551 its reverse (155044), we get a palindrome (595595).

The spelling of 440551 in words is "four hundred forty thousand, five hundred fifty-one".