55212613 has 8 divisors (see below), whose sum is σ = 59104800. Its totient is φ = 51419088.

The previous prime is 55212593. The next prime is 55212629. The reversal of 55212613 is 31621255.

55212613 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 55212613 - 2¹³ = 55204421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55212713) 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, 23506 + ... + 25747.

It is an arithmetic number, because the mean of its divisors is an integer number (7388100).

Almost surely, 2^55212613 is an apocalyptic number.

It is an amenable number.

55212613 is a deficient number, since it is larger than the sum of its proper divisors (3892187).

55212613 is a wasteful number, since it uses less digits than its factorization.

55212613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49331.

The product of its digits is 1800, while the sum is 25.

The square root of 55212613 is about 7430.5190262861. The cubic root of 55212613 is about 380.7846506131.

Adding to 55212613 its reverse (31621255), we get a palindrome (86833868).

The spelling of 55212613 in words is "fifty-five million, two hundred twelve thousand, six hundred thirteen".