55422111 has 16 divisors (see below), whose sum is σ = 78172416. Its totient is φ = 34854336.

The previous prime is 55422109. The next prime is 55422113. The reversal of 55422111 is 11122455.

It is an interprime number because it is at equal distance from previous prime (55422109) and next prime (55422113).

It is not a de Polignac number, because 55422111 - 2¹ = 55422109 is a prime.

It is a super-2 number, since 2×55422111² = 6143220775392642, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55422113) 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, 465 + ... + 10538.

It is an arithmetic number, because the mean of its divisors is an integer number (4885776).

Almost surely, 2^55422111 is an apocalyptic number.

55422111 is a deficient number, since it is larger than the sum of its proper divisors (22750305).

55422111 is a wasteful number, since it uses less digits than its factorization.

55422111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11102.

The product of its digits is 400, while the sum is 21.

The square root of 55422111 is about 7444.6028100900. The cubic root of 55422111 is about 381.2656574775.

Adding to 55422111 its reverse (11122455), we get a palindrome (66544566).

The spelling of 55422111 in words is "fifty-five million, four hundred twenty-two thousand, one hundred eleven".