551340111 has 12 divisors (see below), whose sum is σ = 855139992. Its totient is φ = 315051408.

The previous prime is 551340091. The next prime is 551340149. The reversal of 551340111 is 111043155.

It is a happy number.

It is not a de Polignac number, because 551340111 - 2⁹ = 551339599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551340011) 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, 1875160 + ... + 1875453.

It is an arithmetic number, because the mean of its divisors is an integer number (71261666).

Almost surely, 2^551340111 is an apocalyptic number.

551340111 is a deficient number, since it is larger than the sum of its proper divisors (303799881).

551340111 is a wasteful number, since it uses less digits than its factorization.

551340111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750630 (or 3750623 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 551340111 is about 23480.6326788696. The cubic root of 551340111 is about 819.9861741670.

Adding to 551340111 its reverse (111043155), we get a palindrome (662383266).

The spelling of 551340111 in words is "five hundred fifty-one million, three hundred forty thousand, one hundred eleven".