55324643 has 4 divisors (see below), whose sum is σ = 60354168. Its totient is φ = 50295120.

The previous prime is 55324609. The next prime is 55324673. The reversal of 55324643 is 34642355.

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 55324643 - 2¹² = 55320547 is a prime.

It is a super-2 number, since 2×55324643² = 6121632246154898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55324603) 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, 2514746 + ... + 2514767.

It is an arithmetic number, because the mean of its divisors is an integer number (15088542).

Almost surely, 2^55324643 is an apocalyptic number.

55324643 is a deficient number, since it is larger than the sum of its proper divisors (5029525).

55324643 is a wasteful number, since it uses less digits than its factorization.

55324643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029524.

The product of its digits is 43200, while the sum is 32.

The square root of 55324643 is about 7438.0537104810. The cubic root of 55324643 is about 381.0420222639.

Adding to 55324643 its reverse (34642355), we get a palindrome (89966998).

The spelling of 55324643 in words is "fifty-five million, three hundred twenty-four thousand, six hundred forty-three".