55971589 has 4 divisors (see below), whose sum is σ = 56920320. Its totient is φ = 55022860.

The previous prime is 55971583. The next prime is 55971611. The reversal of 55971589 is 98517955.

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 55971589 - 2⁵ = 55971557 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55971583) 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, 474277 + ... + 474394.

It is an arithmetic number, because the mean of its divisors is an integer number (14230080).

Almost surely, 2^55971589 is an apocalyptic number.

55971589 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

55971589 is a deficient number, since it is larger than the sum of its proper divisors (948731).

55971589 is an equidigital number, since it uses as much as digits as its factorization.

55971589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948730.

The product of its digits is 567000, while the sum is 49.

The square root of 55971589 is about 7481.4162429315. The cubic root of 55971589 is about 382.5215252671.

The spelling of 55971589 in words is "fifty-five million, nine hundred seventy-one thousand, five hundred eighty-nine".