55342220 has 12 divisors (see below), whose sum is σ = 116218704. Its totient is φ = 22136880.

The previous prime is 55342213. The next prime is 55342267. The reversal of 55342220 is 2224355.

It is a super-2 number, since 2×55342220² = 6125522629056800, which contains 22 as substring.

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, 1383536 + ... + 1383575.

It is an arithmetic number, because the mean of its divisors is an integer number (9684892).

Almost surely, 2^55342220 is an apocalyptic number.

It is an amenable number.

55342220 is an abundant number, since it is smaller than the sum of its proper divisors (60876484).

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

55342220 is a wasteful number, since it uses less digits than its factorization.

55342220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767120 (or 2767118 counting only the distinct ones).

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

The square root of 55342220 is about 7439.2351757422. The cubic root of 55342220 is about 381.0823711699.

Adding to 55342220 its reverse (2224355), we get a palindrome (57566575).

The spelling of 55342220 in words is "fifty-five million, three hundred forty-two thousand, two hundred twenty".