55322420 has 24 divisors (see below), whose sum is σ = 123011784. Its totient is φ = 20827136.

The previous prime is 55322411. The next prime is 55322441. The reversal of 55322420 is 2422355.

It can be written as a sum of positive squares in 4 ways, for example, as 6574096 + 48748324 = 2564^2 + 6982^2 .

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, 81017 + ... + 81696.

It is an arithmetic number, because the mean of its divisors is an integer number (5125491).

Almost surely, 2^55322420 is an apocalyptic number.

It is an amenable number.

55322420 is an abundant number, since it is smaller than the sum of its proper divisors (67689364).

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

55322420 is a wasteful number, since it uses less digits than its factorization.

55322420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162739 (or 162737 counting only the distinct ones).

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

The square root of 55322420 is about 7437.9042747269. The cubic root of 55322420 is about 381.0369186445.

Adding to 55322420 its reverse (2422355), we get a palindrome (57744775).

The spelling of 55322420 in words is "fifty-five million, three hundred twenty-two thousand, four hundred twenty".