55643013 has 6 divisors (see below), whose sum is σ = 80373254. Its totient is φ = 37095336.

The previous prime is 55642997. The next prime is 55643017. The reversal of 55643013 is 31034655.

55643013 is a `hidden beast` number, since 5 + 5 + 643 + 0 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 32285124 + 23357889 = 5682^2 + 4833^2 .

It is not a de Polignac number, because 55643013 - 2⁴ = 55642997 is a prime.

It is a super-2 number, since 2×55643013² = 6192289791436338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55643017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3091270 + ... + 3091287.

Almost surely, 2^55643013 is an apocalyptic number.

It is an amenable number.

55643013 is a deficient number, since it is larger than the sum of its proper divisors (24730241).

55643013 is a wasteful number, since it uses less digits than its factorization.

55643013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182563 (or 6182560 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 55643013 is about 7459.4244416041. The cubic root of 55643013 is about 381.7715367724.

Adding to 55643013 its reverse (31034655), we get a palindrome (86677668).

The spelling of 55643013 in words is "fifty-five million, six hundred forty-three thousand, thirteen".