55240213 has 8 divisors (see below), whose sum is σ = 63234432. Its totient is φ = 47271696.

The previous prime is 55240193. The next prime is 55240217. The reversal of 55240213 is 31204255.

55240213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55240213 - 2²¹ = 53143061 is a prime.

It is a super-2 number, since 2×55240213² = 6102962264570738, 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 (55240217) 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 7 ways as a sum of consecutive naturals, for example, 1570 + ... + 10627.

It is an arithmetic number, because the mean of its divisors is an integer number (7904304).

Almost surely, 2^55240213 is an apocalyptic number.

It is an amenable number.

55240213 is a deficient number, since it is larger than the sum of its proper divisors (7994219).

55240213 is a wasteful number, since it uses less digits than its factorization.

55240213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12851.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 55240213 is about 7432.3759996383. The cubic root of 55240213 is about 380.8480896540.

Adding to 55240213 its reverse (31204255), we get a palindrome (86444468).

The spelling of 55240213 in words is "fifty-five million, two hundred forty thousand, two hundred thirteen".