55082021 has 4 divisors (see below), whose sum is σ = 55192032. Its totient is φ = 54972012.

The previous prime is 55082017. The next prime is 55082047. The reversal of 55082021 is 12028055.

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 not a de Polignac number, because 55082021 - 2² = 55082017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55082051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54251 + ... + 55256.

It is an arithmetic number, because the mean of its divisors is an integer number (13798008).

Almost surely, 2^55082021 is an apocalyptic number.

It is an amenable number.

55082021 is a deficient number, since it is larger than the sum of its proper divisors (110011).

55082021 is a wasteful number, since it uses less digits than its factorization.

55082021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110010.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 55082021 is about 7421.7262816679. The cubic root of 55082021 is about 380.4841957953.

The spelling of 55082021 in words is "fifty-five million, eighty-two thousand, twenty-one".