551400111 has 12 divisors (see below), whose sum is σ = 803516688. Its totient is φ = 364346304.

The previous prime is 551400079. The next prime is 551400133. The reversal of 551400111 is 111004155.

It is a happy number.

551400111 is a `hidden beast` number, since 551 + 4 + 0 + 0 + 111 = 666.

It is not a de Polignac number, because 551400111 - 2⁵ = 551400079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551400191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270075 + ... + 272108.

It is an arithmetic number, because the mean of its divisors is an integer number (66959724).

Almost surely, 2^551400111 is an apocalyptic number.

551400111 is a deficient number, since it is larger than the sum of its proper divisors (252116577).

551400111 is a wasteful number, since it uses less digits than its factorization.

551400111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542302 (or 542299 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 551400111 is about 23481.9102928190. The cubic root of 551400111 is about 820.0159182910.

Adding to 551400111 its reverse (111004155), we get a palindrome (662404266).

The spelling of 551400111 in words is "five hundred fifty-one million, four hundred thousand, one hundred eleven".