55612232 has 32 divisors (see below), whose sum is σ = 113131200. Its totient is φ = 25475904.

The previous prime is 55612231. The next prime is 55612237. The reversal of 55612232 is 23221655.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (55612231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12533 + ... + 16379.

It is an arithmetic number, because the mean of its divisors is an integer number (3535350).

Almost surely, 2^55612232 is an apocalyptic number.

55612232 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55612232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56565600).

55612232 is an abundant number, since it is smaller than the sum of its proper divisors (57518968).

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

55612232 is a wasteful number, since it uses less digits than its factorization.

55612232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005 (or 4001 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 55612232 is about 7457.3609272986. The cubic root of 55612232 is about 381.7011267509.

Adding to 55612232 its reverse (23221655), we get a palindrome (78833887).

The spelling of 55612232 in words is "fifty-five million, six hundred twelve thousand, two hundred thirty-two".