216742443 has 16 divisors (see below), whose sum is σ = 304512000. Its totient is φ = 136749600.

The previous prime is 216742439. The next prime is 216742447. The reversal of 216742443 is 344247612.

It is an interprime number because it is at equal distance from previous prime (216742439) and next prime (216742447).

It is not a de Polignac number, because 216742443 - 2² = 216742439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216742447) 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, 110118 + ... + 112068.

It is an arithmetic number, because the mean of its divisors is an integer number (19032000).

Almost surely, 2^216742443 is an apocalyptic number.

216742443 is a deficient number, since it is larger than the sum of its proper divisors (87769557).

216742443 is a wasteful number, since it uses less digits than its factorization.

216742443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922.

The product of its digits is 32256, while the sum is 33.

The square root of 216742443 is about 14722.1752129229. The cubic root of 216742443 is about 600.6866610834.

The spelling of 216742443 in words is "two hundred sixteen million, seven hundred forty-two thousand, four hundred forty-three".