551243111099 has 4 divisors (see below), whose sum is σ = 580255906440. Its totient is φ = 522230315760.

The previous prime is 551243111033. The next prime is 551243111113. The reversal of 551243111099 is 990111342155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551243111099 - 2¹² = 551243107003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551243111599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14506397642 + ... + 14506397679.

It is an arithmetic number, because the mean of its divisors is an integer number (145063976610).

Almost surely, 2^551243111099 is an apocalyptic number.

551243111099 is a deficient number, since it is larger than the sum of its proper divisors (29012795341).

551243111099 is a wasteful number, since it uses less digits than its factorization.

551243111099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29012795340.

The product of its (nonzero) digits is 48600, while the sum is 41.

The spelling of 551243111099 in words is "five hundred fifty-one billion, two hundred forty-three million, one hundred eleven thousand, ninety-nine".