216242043 has 4 divisors (see below), whose sum is σ = 288322728. Its totient is φ = 144161360.

The previous prime is 216242029. The next prime is 216242051. The reversal of 216242043 is 340242612.

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 216242043 - 2⁴ = 216242027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216242053) 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, 36040338 + ... + 36040343.

It is an arithmetic number, because the mean of its divisors is an integer number (72080682).

Almost surely, 2^216242043 is an apocalyptic number.

216242043 is a deficient number, since it is larger than the sum of its proper divisors (72080685).

216242043 is an equidigital number, since it uses as much as digits as its factorization.

216242043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72080684.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 216242043 is about 14705.1706212475. The cubic root of 216242043 is about 600.2240302292.

Adding to 216242043 its reverse (340242612), we get a palindrome (556484655).

The spelling of 216242043 in words is "two hundred sixteen million, two hundred forty-two thousand, forty-three".