55271643 has 8 divisors (see below), whose sum is σ = 84223488. Its totient is φ = 31583784.

The previous prime is 55271621. The next prime is 55271647. The reversal of 55271643 is 34617255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55271643 - 2¹⁰ = 55270619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55271647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1315971 + ... + 1316012.

It is an arithmetic number, because the mean of its divisors is an integer number (10527936).

Almost surely, 2^55271643 is an apocalyptic number.

55271643 is a deficient number, since it is larger than the sum of its proper divisors (28951845).

55271643 is a wasteful number, since it uses less digits than its factorization.

55271643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631993.

The product of its digits is 25200, while the sum is 33.

The square root of 55271643 is about 7434.4900968392. The cubic root of 55271643 is about 380.9203062834.

Adding to 55271643 its reverse (34617255), we get a palindrome (89888898).

The spelling of 55271643 in words is "fifty-five million, two hundred seventy-one thousand, six hundred forty-three".