55030389 has 4 divisors (see below), whose sum is σ = 73373856. Its totient is φ = 36686924.

The previous prime is 55030387. The next prime is 55030427. The reversal of 55030389 is 98303055.

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 55030389 - 2¹ = 55030387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55030387) 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, 9171729 + ... + 9171734.

It is an arithmetic number, because the mean of its divisors is an integer number (18343464).

Almost surely, 2^55030389 is an apocalyptic number.

It is an amenable number.

55030389 is a deficient number, since it is larger than the sum of its proper divisors (18343467).

55030389 is a wasteful number, since it uses less digits than its factorization.

55030389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18343466.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 55030389 is about 7418.2470301278. The cubic root of 55030389 is about 380.3652743453.

The spelling of 55030389 in words is "fifty-five million, thirty thousand, three hundred eighty-nine".