55120356 has 36 divisors (see below), whose sum is σ = 143829504. Its totient is φ = 17780400.

The previous prime is 55120339. The next prime is 55120361. The reversal of 55120356 is 65302155.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 23580 + ... + 25811.

It is an arithmetic number, because the mean of its divisors is an integer number (3995264).

Almost surely, 2^55120356 is an apocalyptic number.

It is an amenable number.

55120356 is an abundant number, since it is smaller than the sum of its proper divisors (88709148).

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

55120356 is a wasteful number, since it uses less digits than its factorization.

55120356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49432 (or 49427 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 55120356 is about 7424.3084526439. The cubic root of 55120356 is about 380.5724428552.

The spelling of 55120356 in words is "fifty-five million, one hundred twenty thousand, three hundred fifty-six".