55012230 has 128 divisors (see below), whose sum is σ = 180633600. Its totient is φ = 11601792.

The previous prime is 55012219. The next prime is 55012241. The reversal of 55012230 is 3221055.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55012219) and next prime (55012241).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23451 + ... + 25689.

It is an arithmetic number, because the mean of its divisors is an integer number (1411200).

Almost surely, 2^55012230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55012230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90316800).

55012230 is an abundant number, since it is smaller than the sum of its proper divisors (125621370).

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

55012230 is a wasteful number, since it uses less digits than its factorization.

55012230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275 (or 2269 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 55012230 is about 7417.0229876953. The cubic root of 55012230 is about 380.3234319317.

Adding to 55012230 its reverse (3221055), we get a palindrome (58233285).

The spelling of 55012230 in words is "fifty-five million, twelve thousand, two hundred thirty".