551011543 has 2 divisors, whose sum is σ = 551011544. Its totient is φ = 551011542.

The previous prime is 551011501. The next prime is 551011553. The reversal of 551011543 is 345110155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551011543 - 2¹³ = 551003351 is a prime.

It is a super-2 number, since 2×551011543² = 607227441038481698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551011553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275505771 + 275505772.

It is an arithmetic number, because the mean of its divisors is an integer number (275505772).

Almost surely, 2^551011543 is an apocalyptic number.

551011543 is a deficient number, since it is larger than the sum of its proper divisors (1).

551011543 is an equidigital number, since it uses as much as digits as its factorization.

551011543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 551011543 is about 23473.6350614897. The cubic root of 551011543 is about 819.8232531015.

Adding to 551011543 its reverse (345110155), we get a palindrome (896121698).

It can be divided in two parts, 55101 and 1543, that added together give a square (56644 = 238²).

The spelling of 551011543 in words is "five hundred fifty-one million, eleven thousand, five hundred forty-three".