55322211 has 16 divisors (see below), whose sum is σ = 84620288. Its totient is φ = 31492800.

The previous prime is 55322207. The next prime is 55322213. The reversal of 55322211 is 11222355.

It is not a de Polignac number, because 55322211 - 2² = 55322207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55322213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 831 + ... + 10551.

It is an arithmetic number, because the mean of its divisors is an integer number (5288768).

Almost surely, 2^55322211 is an apocalyptic number.

55322211 is a deficient number, since it is larger than the sum of its proper divisors (29298077).

55322211 is a wasteful number, since it uses less digits than its factorization.

55322211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10002.

The product of its digits is 600, while the sum is 21.

The square root of 55322211 is about 7437.8902250571. The cubic root of 55322211 is about 381.0364388100.

Adding to 55322211 its reverse (11222355), we get a palindrome (66544566).

The spelling of 55322211 in words is "fifty-five million, three hundred twenty-two thousand, two hundred eleven".