55006013 has 4 divisors (see below), whose sum is σ = 56492700. Its totient is φ = 53519328.

The previous prime is 55005991. The next prime is 55006037. The reversal of 55006013 is 31060055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45873529 + 9132484 = 6773^2 + 3022^2 .

It is a cyclic number.

It is not a de Polignac number, because 55006013 - 2¹⁶ = 54940477 is a prime.

It is a super-2 number, since 2×55006013² = 6051322932312338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55006213) 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, 743288 + ... + 743361.

It is an arithmetic number, because the mean of its divisors is an integer number (14123175).

Almost surely, 2^55006013 is an apocalyptic number.

It is an amenable number.

55006013 is a deficient number, since it is larger than the sum of its proper divisors (1486687).

55006013 is a wasteful number, since it uses less digits than its factorization.

55006013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486686.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 55006013 is about 7416.6038723933. The cubic root of 55006013 is about 380.3091044518.

Adding to 55006013 its reverse (31060055), we get a palindrome (86066068).

The spelling of 55006013 in words is "fifty-five million, six thousand, thirteen".