55520811 has 24 divisors (see below), whose sum is σ = 81914976. Its totient is φ = 36230400.

The previous prime is 55520791. The next prime is 55520851. The reversal of 55520811 is 11802555.

It is not a de Polignac number, because 55520811 - 2⁵ = 55520779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55520851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93331 + ... + 93923.

It is an arithmetic number, because the mean of its divisors is an integer number (3413124).

Almost surely, 2^55520811 is an apocalyptic number.

55520811 is a deficient number, since it is larger than the sum of its proper divisors (26394165).

55520811 is a wasteful number, since it uses less digits than its factorization.

55520811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 55520811 is about 7451.2288248315. The cubic root of 55520811 is about 381.4918524209.

The spelling of 55520811 in words is "fifty-five million, five hundred twenty thousand, eight hundred eleven".