55620213 has 16 divisors (see below), whose sum is σ = 83090496. Its totient is φ = 32797440.

The previous prime is 55620203. The next prime is 55620263. The reversal of 55620213 is 31202655.

55620213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55620213 - 2⁵ = 55620181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55620203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21556 + ... + 23997.

It is an arithmetic number, because the mean of its divisors is an integer number (5193156).

Almost surely, 2^55620213 is an apocalyptic number.

It is an amenable number.

55620213 is a deficient number, since it is larger than the sum of its proper divisors (27470283).

55620213 is a wasteful number, since it uses less digits than its factorization.

55620213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45604.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 55620213 is about 7457.8960169742. The cubic root of 55620213 is about 381.7193853897.

Adding to 55620213 its reverse (31202655), we get a palindrome (86822868).

The spelling of 55620213 in words is "fifty-five million, six hundred twenty thousand, two hundred thirteen".