55811343 has 24 divisors (see below), whose sum is σ = 86912688. Its totient is φ = 31764096.

The previous prime is 55811333. The next prime is 55811359. The reversal of 55811343 is 34311855.

It is not a de Polignac number, because 55811343 - 2¹⁷ = 55680271 is a prime.

It is a super-2 number, since 2×55811343² = 6229812014927298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55811343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55811333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45405 + ... + 46617.

It is an arithmetic number, because the mean of its divisors is an integer number (3621362).

Almost surely, 2^55811343 is an apocalyptic number.

55811343 is a deficient number, since it is larger than the sum of its proper divisors (31101345).

55811343 is a wasteful number, since it uses less digits than its factorization.

55811343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543 (or 1536 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 55811343 is about 7470.6989632832. The cubic root of 55811343 is about 382.1561247921.

The spelling of 55811343 in words is "fifty-five million, eight hundred eleven thousand, three hundred forty-three".