55622211 has 16 divisors (see below), whose sum is σ = 79482624. Its totient is φ = 34509024.

The previous prime is 55622183. The next prime is 55622213. The reversal of 55622211 is 11222655.

It is a happy number.

It is not a de Polignac number, because 55622211 - 2¹⁹ = 55097923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55622213) 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, 8341 + ... + 13446.

It is an arithmetic number, because the mean of its divisors is an integer number (4967664).

Almost surely, 2^55622211 is an apocalyptic number.

55622211 is a deficient number, since it is larger than the sum of its proper divisors (23860413).

55622211 is a wasteful number, since it uses less digits than its factorization.

55622211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21850.

The product of its digits is 1200, while the sum is 24.

The square root of 55622211 is about 7458.0299677596. The cubic root of 55622211 is about 381.7239560674.

Adding to 55622211 its reverse (11222655), we get a palindrome (66844866).

The spelling of 55622211 in words is "fifty-five million, six hundred twenty-two thousand, two hundred eleven".