55355420 has 12 divisors (see below), whose sum is σ = 116246424. Its totient is φ = 22142160.

The previous prime is 55355407. The next prime is 55355431. The reversal of 55355420 is 2455355.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383866 + ... + 1383905.

It is an arithmetic number, because the mean of its divisors is an integer number (9687202).

Almost surely, 2^55355420 is an apocalyptic number.

It is an amenable number.

55355420 is an abundant number, since it is smaller than the sum of its proper divisors (60891004).

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

55355420 is a wasteful number, since it uses less digits than its factorization.

55355420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767780 (or 2767778 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 55355420 is about 7440.1223108226. The cubic root of 55355420 is about 381.1126668309.

The spelling of 55355420 in words is "fifty-five million, three hundred fifty-five thousand, four hundred twenty".