55521489 has 4 divisors (see below), whose sum is σ = 74028656. Its totient is φ = 37014324.

The previous prime is 55521469. The next prime is 55521491. The reversal of 55521489 is 98412555.

55521489 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 not a de Polignac number, because 55521489 - 2⁸ = 55521233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55521469) 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, 9253579 + ... + 9253584.

It is an arithmetic number, because the mean of its divisors is an integer number (18507164).

Almost surely, 2^55521489 is an apocalyptic number.

It is an amenable number.

55521489 is a deficient number, since it is larger than the sum of its proper divisors (18507167).

55521489 is a wasteful number, since it uses less digits than its factorization.

55521489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18507166.

The product of its digits is 72000, while the sum is 39.

The square root of 55521489 is about 7451.2743205441. The cubic root of 55521489 is about 381.4934052946.

The spelling of 55521489 in words is "fifty-five million, five hundred twenty-one thousand, four hundred eighty-nine".