55010220 has 24 divisors (see below), whose sum is σ = 154028784. Its totient is φ = 14669376.

The previous prime is 55010203. The next prime is 55010251. The reversal of 55010220 is 2201055.

It is a super-2 number, since 2×55010220² = 6052248608896800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 55010220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458359 + ... + 458478.

It is an arithmetic number, because the mean of its divisors is an integer number (6417866).

Almost surely, 2^55010220 is an apocalyptic number.

It is an amenable number.

55010220 is an abundant number, since it is smaller than the sum of its proper divisors (99018564).

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

55010220 is a wasteful number, since it uses less digits than its factorization.

55010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916849 (or 916847 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 55010220 is about 7416.8874873494. The cubic root of 55010220 is about 380.3187998744.

Adding to 55010220 its reverse (2201055), we get a palindrome (57211275).

The spelling of 55010220 in words is "fifty-five million, ten thousand, two hundred twenty".