55021822 has 8 divisors (see below), whose sum is σ = 82643472. Its totient is φ = 27474000.

The previous prime is 55021789. The next prime is 55021829. The reversal of 55021822 is 22812055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55021829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16554 + ... + 19597.

It is an arithmetic number, because the mean of its divisors is an integer number (10330434).

Almost surely, 2^55021822 is an apocalyptic number.

55021822 is a deficient number, since it is larger than the sum of its proper divisors (27621650).

55021822 is a wasteful number, since it uses less digits than its factorization.

55021822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36914.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 55021822 is about 7417.6695801309. The cubic root of 55021822 is about 380.3455352007.

Adding to 55021822 its reverse (22812055), we get a palindrome (77833877).

The spelling of 55021822 in words is "fifty-five million, twenty-one thousand, eight hundred twenty-two".