55232420 has 12 divisors (see below), whose sum is σ = 115988124. Its totient is φ = 22092960.

The previous prime is 55232383. The next prime is 55232431. The reversal of 55232420 is 2423255.

55232420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 26050816 + 29181604 = 5104^2 + 5402^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380791 + ... + 1380830.

It is an arithmetic number, because the mean of its divisors is an integer number (9665677).

Almost surely, 2^55232420 is an apocalyptic number.

It is an amenable number.

55232420 is an abundant number, since it is smaller than the sum of its proper divisors (60755704).

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

55232420 is a wasteful number, since it uses less digits than its factorization.

55232420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761630 (or 2761628 counting only the distinct ones).

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

The square root of 55232420 is about 7431.8517208028. The cubic root of 55232420 is about 380.8301794603.

Adding to 55232420 its reverse (2423255), we get a palindrome (57655675).

The spelling of 55232420 in words is "fifty-five million, two hundred thirty-two thousand, four hundred twenty".