55631443 has 4 divisors (see below), whose sum is σ = 63578800. Its totient is φ = 47684088.

The previous prime is 55631441. The next prime is 55631447. The reversal of 55631443 is 34413655.

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 55631443 - 2¹ = 55631441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55631441) 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, 3973668 + ... + 3973681.

It is an arithmetic number, because the mean of its divisors is an integer number (15894700).

Almost surely, 2^55631443 is an apocalyptic number.

55631443 is a deficient number, since it is larger than the sum of its proper divisors (7947357).

55631443 is an equidigital number, since it uses as much as digits as its factorization.

55631443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7947356.

The product of its digits is 21600, while the sum is 31.

The square root of 55631443 is about 7458.6488722824. The cubic root of 55631443 is about 381.7450740138.

The spelling of 55631443 in words is "fifty-five million, six hundred thirty-one thousand, four hundred forty-three".