551111632 has 20 divisors (see below), whose sum is σ = 1077761376. Its totient is φ = 272979680.

The previous prime is 551111597. The next prime is 551111641. The reversal of 551111632 is 236111155.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 551111597 and 551111606.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 159244 + ... + 162667.

Almost surely, 2^551111632 is an apocalyptic number.

It is an amenable number.

551111632 is a deficient number, since it is larger than the sum of its proper divisors (526649744).

551111632 is a wasteful number, since it uses less digits than its factorization.

551111632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322026 (or 322020 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

The square root of 551111632 is about 23475.7669097306. The cubic root of 551111632 is about 819.8728892799.

Adding to 551111632 its reverse (236111155), we get a palindrome (787222787).

The spelling of 551111632 in words is "five hundred fifty-one million, one hundred eleven thousand, six hundred thirty-two".