55643135 has 4 divisors (see below), whose sum is σ = 66771768. Its totient is φ = 44514504.

The previous prime is 55643129. The next prime is 55643143. The reversal of 55643135 is 53134655.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55643135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5564309 + ... + 5564318.

It is an arithmetic number, because the mean of its divisors is an integer number (16692942).

Almost surely, 2^55643135 is an apocalyptic number.

55643135 is a deficient number, since it is larger than the sum of its proper divisors (11128633).

55643135 is a wasteful number, since it uses less digits than its factorization.

55643135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11128632.

The product of its digits is 27000, while the sum is 32.

The square root of 55643135 is about 7459.4326191742. The cubic root of 55643135 is about 381.7718157898.

The spelling of 55643135 in words is "fifty-five million, six hundred forty-three thousand, one hundred thirty-five".