551394099 has 12 divisors (see below), whose sum is σ = 843308856. Its totient is φ = 345972672.

The previous prime is 551394073. The next prime is 551394127. The reversal of 551394099 is 990493155.

It is a happy number.

551394099 is a `hidden beast` number, since 5 + 513 + 9 + 40 + 99 = 666.

It is not a de Polignac number, because 551394099 - 2⁹ = 551393587 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (551394029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1801789 + ... + 1802094.

It is an arithmetic number, because the mean of its divisors is an integer number (70275738).

Almost surely, 2^551394099 is an apocalyptic number.

551394099 is a deficient number, since it is larger than the sum of its proper divisors (291914757).

551394099 is a wasteful number, since it uses less digits than its factorization.

551394099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603906 (or 3603903 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 551394099 is about 23481.7822790350. The cubic root of 551394099 is about 820.0129380271.

The spelling of 551394099 in words is "five hundred fifty-one million, three hundred ninety-four thousand, ninety-nine".