55322240 has 32 divisors (see below), whose sum is σ = 132256260. Its totient is φ = 22128640.

The previous prime is 55322237. The next prime is 55322261. The reversal of 55322240 is 4222355.

It can be written as a sum of positive squares in 2 ways, for example, as 55234624 + 87616 = 7432^2 + 296^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42581 + ... + 43860.

Almost surely, 2^55322240 is an apocalyptic number.

It is an amenable number.

55322240 is an abundant number, since it is smaller than the sum of its proper divisors (76934020).

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

55322240 is an equidigital number, since it uses as much as digits as its factorization.

55322240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86460 (or 86448 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 55322240 is about 7437.8921745344. The cubic root of 55322240 is about 381.0365053900.

Adding to 55322240 its reverse (4222355), we get a palindrome (59544595).

The spelling of 55322240 in words is "fifty-five million, three hundred twenty-two thousand, two hundred forty".