55411213 has 24 divisors (see below), whose sum is σ = 67144896. Its totient is φ = 45302400.

The previous prime is 55411193. The next prime is 55411217. The reversal of 55411213 is 31211455.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-55411213 is a prime.

It is a super-2 number, since 2×55411213² = 6140805052262738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55411217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75856 + ... + 76582.

It is an arithmetic number, because the mean of its divisors is an integer number (2797704).

Almost surely, 2^55411213 is an apocalyptic number.

It is an amenable number.

55411213 is a deficient number, since it is larger than the sum of its proper divisors (11733683).

55411213 is a wasteful number, since it uses less digits than its factorization.

55411213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 792 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 55411213 is about 7443.8708344517. The cubic root of 55411213 is about 381.2406656140.

Adding to 55411213 its reverse (31211455), we get a palindrome (86622668).

The spelling of 55411213 in words is "fifty-five million, four hundred eleven thousand, two hundred thirteen".