551113111 has 6 divisors (see below), whose sum is σ = 557840000. Its totient is φ = 544466388.

The previous prime is 551113109. The next prime is 551113127. The reversal of 551113111 is 111311155.

It is not a de Polignac number, because 551113111 - 2¹ = 551113109 is a prime.

It is a super-2 number, since 2×551113111² = 607451322232196642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551113141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33111 + ... + 46888.

Almost surely, 2^551113111 is an apocalyptic number.

551113111 is a deficient number, since it is larger than the sum of its proper divisors (6726889).

551113111 is an frugal number, since it uses more digits than its factorization.

551113111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80165 (or 80082 counting only the distinct ones).

The product of its digits is 75, while the sum is 19.

The square root of 551113111 is about 23475.7984102778. The cubic root of 551113111 is about 819.8736227012.

Adding to 551113111 its reverse (111311155), we get a palindrome (662424266).

The spelling of 551113111 in words is "five hundred fifty-one million, one hundred thirteen thousand, one hundred eleven".