55220030 has 16 divisors (see below), whose sum is σ = 101821104. Its totient is φ = 21549120.

The previous prime is 55220003. The next prime is 55220059. The reversal of 55220030 is 3002255.

It is a junction number, because it is equal to n+sod(n) for n = 55219990 and 55220008.

It is a congruent number.

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, 66932 + ... + 67751.

It is an arithmetic number, because the mean of its divisors is an integer number (6363819).

Almost surely, 2^55220030 is an apocalyptic number.

55220030 is a deficient number, since it is larger than the sum of its proper divisors (46601074).

55220030 is a wasteful number, since it uses less digits than its factorization.

55220030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134731.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 55220030 is about 7431.0180998299. The cubic root of 55220030 is about 380.8017007830.

Adding to 55220030 its reverse (3002255), we get a palindrome (58222285).

The spelling of 55220030 in words is "fifty-five million, two hundred twenty thousand, thirty".