551320111 has 2 divisors, whose sum is σ = 551320112. Its totient is φ = 551320110.

The previous prime is 551320103. The next prime is 551320127. The reversal of 551320111 is 111023155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551320111 - 2³ = 551320103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551320141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275660055 + 275660056.

It is an arithmetic number, because the mean of its divisors is an integer number (275660056).

Almost surely, 2^551320111 is an apocalyptic number.

551320111 is a deficient number, since it is larger than the sum of its proper divisors (1).

551320111 is an equidigital number, since it uses as much as digits as its factorization.

551320111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 551320111 is about 23480.2067921047. The cubic root of 551320111 is about 819.9762589795.

Adding to 551320111 its reverse (111023155), we get a palindrome (662343266).

The spelling of 551320111 in words is "five hundred fifty-one million, three hundred twenty thousand, one hundred eleven".