55223412 has 48 divisors (see below), whose sum is σ = 136971072. Its totient is φ = 17256960.

The previous prime is 55223411. The next prime is 55223419. The reversal of 55223412 is 21432255.

55223412 is nontrivially palindromic in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55223411) 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, 85563 + ... + 86205.

It is an arithmetic number, because the mean of its divisors is an integer number (2853564).

Almost surely, 2^55223412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55223412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68485536).

55223412 is an abundant number, since it is smaller than the sum of its proper divisors (81747660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55223412 is a wasteful number, since it uses less digits than its factorization.

55223412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088 (or 1086 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 55223412 is about 7431.2456560122. The cubic root of 55223412 is about 380.8094748043.

Adding to 55223412 its reverse (21432255), we get a palindrome (76655667).

The spelling of 55223412 in words is "fifty-five million, two hundred twenty-three thousand, four hundred twelve".