551140443 has 20 divisors (see below), whose sum is σ = 940925040. Its totient is φ = 314937072.

The previous prime is 551140427. The next prime is 551140507. The reversal of 551140443 is 344041155.

It is a happy number.

It is not a de Polignac number, because 551140443 - 2⁴ = 551140427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (551140043) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 485448 + ... + 486581.

It is an arithmetic number, because the mean of its divisors is an integer number (47046252).

Almost surely, 2^551140443 is an apocalyptic number.

551140443 is a deficient number, since it is larger than the sum of its proper divisors (389784597).

551140443 is an equidigital number, since it uses as much as digits as its factorization.

551140443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972048 (or 972039 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 551140443 is about 23476.3805344861. The cubic root of 551140443 is about 819.8871761291.

Adding to 551140443 its reverse (344041155), we get a palindrome (895181598).

It can be divided in two parts, 5511 and 40443, that added together give a palindrome (45954).

The spelling of 551140443 in words is "five hundred fifty-one million, one hundred forty thousand, four hundred forty-three".