55820270 has 32 divisors (see below), whose sum is σ = 112293216. Its totient is φ = 19801600.

The previous prime is 55820269. The next prime is 55820291. The reversal of 55820270 is 7202855.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1679 + ... + 10698.

It is an arithmetic number, because the mean of its divisors is an integer number (3509163).

Almost surely, 2^55820270 is an apocalyptic number.

55820270 is an abundant number, since it is smaller than the sum of its proper divisors (56472946).

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

55820270 is a wasteful number, since it uses less digits than its factorization.

55820270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12436.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 55820270 is about 7471.2964069163. The cubic root of 55820270 is about 382.1764989411.

The spelling of 55820270 in words is "fifty-five million, eight hundred twenty thousand, two hundred seventy".