551011110511 has 4 divisors (see below), whose sum is σ = 552133333224. Its totient is φ = 549888887800.

The previous prime is 551011110493. The next prime is 551011110523. The reversal of 551011110511 is 115011110155.

It is a happy number.

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 551011110511 - 2¹¹ = 551011108463 is a prime.

It is a super-2 number, since 2×551011110511² (a number of 24 digits) 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 (551011116511) 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, 561110620 + ... + 561111601.

It is an arithmetic number, because the mean of its divisors is an integer number (138033333306).

Almost surely, 2^551011110511 is an apocalyptic number.

551011110511 is a deficient number, since it is larger than the sum of its proper divisors (1122222713).

551011110511 is a wasteful number, since it uses less digits than its factorization.

551011110511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122222712.

The product of its (nonzero) digits is 125, while the sum is 22.

Adding to 551011110511 its reverse (115011110155), we get a palindrome (666022220666).

The spelling of 551011110511 in words is "five hundred fifty-one billion, eleven million, one hundred ten thousand, five hundred eleven".