55030081 has 4 divisors (see below), whose sum is σ = 56927700. Its totient is φ = 53132464.

The previous prime is 55030051. The next prime is 55030163. The reversal of 55030081 is 18003055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42185025 + 12845056 = 6495^2 + 3584^2 .

It is a cyclic number.

It is not a de Polignac number, because 55030081 - 2⁵ = 55030049 is a prime.

It is a super-2 number, since 2×55030081² = 6056619629733122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55030051) 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, 948766 + ... + 948823.

It is an arithmetic number, because the mean of its divisors is an integer number (14231925).

Almost surely, 2^55030081 is an apocalyptic number.

It is an amenable number.

55030081 is a deficient number, since it is larger than the sum of its proper divisors (1897619).

55030081 is a wasteful number, since it uses less digits than its factorization.

55030081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897618.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 55030081 is about 7418.2262704773. The cubic root of 55030081 is about 380.3645647208.

The spelling of 55030081 in words is "fifty-five million, thirty thousand, eighty-one".