55643161 has 16 divisors (see below), whose sum is σ = 65374848. Its totient is φ = 46368000.

The previous prime is 55643143. The next prime is 55643207. The reversal of 55643161 is 16134655.

It is not a de Polignac number, because 55643161 - 2⁵ = 55643129 is a prime.

It is a super-2 number, since 2×55643161² = 6192322732143842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55643101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120471 + ... + 120931.

It is an arithmetic number, because the mean of its divisors is an integer number (4085928).

Almost surely, 2^55643161 is an apocalyptic number.

It is an amenable number.

55643161 is a deficient number, since it is larger than the sum of its proper divisors (9731687).

55643161 is a wasteful number, since it uses less digits than its factorization.

55643161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912.

The product of its digits is 10800, while the sum is 31.

The square root of 55643161 is about 7459.4343619339. The cubic root of 55643161 is about 381.7718752524.

The spelling of 55643161 in words is "fifty-five million, six hundred forty-three thousand, one hundred sixty-one".