55330213 has 4 divisors (see below), whose sum is σ = 55383328. Its totient is φ = 55277100.

The previous prime is 55330211. The next prime is 55330237. The reversal of 55330213 is 31203355.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31203355 = 5 ⋅6240671.

It is a cyclic number.

It is not a de Polignac number, because 55330213 - 2¹ = 55330211 is a prime.

It is a super-2 number, since 2×55330213² = 6122864941250738, 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 (55330211) 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, 24963 + ... + 27088.

It is an arithmetic number, because the mean of its divisors is an integer number (13845832).

Almost surely, 2^55330213 is an apocalyptic number.

It is an amenable number.

55330213 is a deficient number, since it is larger than the sum of its proper divisors (53115).

55330213 is a wasteful number, since it uses less digits than its factorization.

55330213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53114.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 55330213 is about 7438.4281269634. The cubic root of 55330213 is about 381.0548094097.

Adding to 55330213 its reverse (31203355), we get a palindrome (86533568).

The spelling of 55330213 in words is "fifty-five million, three hundred thirty thousand, two hundred thirteen".