55020869 has 4 divisors (see below), whose sum is σ = 55842144. Its totient is φ = 54199596.

The previous prime is 55020851. The next prime is 55020871. The reversal of 55020869 is 96802055.

55020869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55020869 is a prime.

It is a super-2 number, since 2×55020869² = 6054592051030322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55020829) 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 3 ways as a sum of consecutive naturals, for example, 410537 + ... + 410670.

It is an arithmetic number, because the mean of its divisors is an integer number (13960536).

Almost surely, 2^55020869 is an apocalyptic number.

It is an amenable number.

55020869 is a deficient number, since it is larger than the sum of its proper divisors (821275).

55020869 is an equidigital number, since it uses as much as digits as its factorization.

55020869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821274.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 55020869 is about 7417.6053413484. The cubic root of 55020869 is about 380.3433392756.

The spelling of 55020869 in words is "fifty-five million, twenty thousand, eight hundred sixty-nine".