55433213 has 4 divisors (see below), whose sum is σ = 60472608. Its totient is φ = 50393820.

The previous prime is 55433171. The next prime is 55433221. The reversal of 55433213 is 31233455.

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.

It is a cyclic number.

It is not a de Polignac number, because 55433213 - 2¹² = 55429117 is a prime.

It is a super-2 number, since 2×55433213² = 6145682207006738, 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 (55433113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2519681 + ... + 2519702.

It is an arithmetic number, because the mean of its divisors is an integer number (15118152).

Almost surely, 2^55433213 is an apocalyptic number.

It is an amenable number.

55433213 is a deficient number, since it is larger than the sum of its proper divisors (5039395).

55433213 is a wasteful number, since it uses less digits than its factorization.

55433213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5039394.

The product of its digits is 5400, while the sum is 26.

The square root of 55433213 is about 7445.3484136070. The cubic root of 55433213 is about 381.2911137960.

Adding to 55433213 its reverse (31233455), we get a palindrome (86666668).

The spelling of 55433213 in words is "fifty-five million, four hundred thirty-three thousand, two hundred thirteen".