55561730 has 16 divisors (see below), whose sum is σ = 114298560. Its totient is φ = 19049712.

The previous prime is 55561711. The next prime is 55561733. The reversal of 55561730 is 3716555.

55561730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55561733) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 396800 + ... + 396939.

It is an arithmetic number, because the mean of its divisors is an integer number (7143660).

Almost surely, 2^55561730 is an apocalyptic number.

55561730 is an abundant number, since it is smaller than the sum of its proper divisors (58736830).

55561730 is a wasteful number, since it uses less digits than its factorization.

55561730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793753.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 55561730 is about 7453.9741078166. The cubic root of 55561730 is about 381.5855496098.

The spelling of 55561730 in words is "fifty-five million, five hundred sixty-one thousand, seven hundred thirty".