55127643 has 4 divisors (see below), whose sum is σ = 73503528. Its totient is φ = 36751760.

The previous prime is 55127621. The next prime is 55127647. The reversal of 55127643 is 34672155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55127643 - 2²⁴ = 38350427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55127647) 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, 9187938 + ... + 9187943.

It is an arithmetic number, because the mean of its divisors is an integer number (18375882).

Almost surely, 2^55127643 is an apocalyptic number.

55127643 is a deficient number, since it is larger than the sum of its proper divisors (18375885).

55127643 is a wasteful number, since it uses less digits than its factorization.

55127643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18375884.

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

The square root of 55127643 is about 7424.7991892037. The cubic root of 55127643 is about 380.5892128799.

Adding to 55127643 its reverse (34672155), we get a palindrome (89799798).

The spelling of 55127643 in words is "fifty-five million, one hundred twenty-seven thousand, six hundred forty-three".