55832421 has 4 divisors (see below), whose sum is σ = 74443232. Its totient is φ = 37221612.

The previous prime is 55832417. The next prime is 55832429. The reversal of 55832421 is 12423855.

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 55832421 - 2² = 55832417 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 (55832429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9305401 + ... + 9305406.

It is an arithmetic number, because the mean of its divisors is an integer number (18610808).

Almost surely, 2^55832421 is an apocalyptic number.

It is an amenable number.

55832421 is a deficient number, since it is larger than the sum of its proper divisors (18610811).

55832421 is a wasteful number, since it uses less digits than its factorization.

55832421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18610810.

The product of its digits is 9600, while the sum is 30.

The square root of 55832421 is about 7472.1095414883. The cubic root of 55832421 is about 382.2042277555.

The spelling of 55832421 in words is "fifty-five million, eight hundred thirty-two thousand, four hundred twenty-one".