55021210 has 16 divisors (see below), whose sum is σ = 99292392. Its totient is φ = 21952000.

The previous prime is 55021189. The next prime is 55021223. The reversal of 55021210 is 1212055.

It can be written as a sum of positive squares in 4 ways, for example, as 50936769 + 4084441 = 7137^2 + 2021^2 .

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, 2851 + ... + 10870.

Almost surely, 2^55021210 is an apocalyptic number.

55021210 is a deficient number, since it is larger than the sum of its proper divisors (44271182).

55021210 is a wasteful number, since it uses less digits than its factorization.

55021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14129.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 55021210 is about 7417.6283271677. The cubic root of 55021210 is about 380.3441250188.

Adding to 55021210 its reverse (1212055), we get a palindrome (56233265).

The spelling of 55021210 in words is "fifty-five million, twenty-one thousand, two hundred ten".