163216437 has 16 divisors (see below), whose sum is σ = 226860480. Its totient is φ = 104249600.

The previous prime is 163216421. The next prime is 163216447. The reversal of 163216437 is 734612361.

It is a cyclic number.

It is not a de Polignac number, because 163216437 - 2⁴ = 163216421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163216398 and 163216407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163216447) 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, 4237 + ... + 18557.

It is an arithmetic number, because the mean of its divisors is an integer number (14178780).

Almost surely, 2^163216437 is an apocalyptic number.

It is an amenable number.

163216437 is a deficient number, since it is larger than the sum of its proper divisors (63644043).

163216437 is a wasteful number, since it uses less digits than its factorization.

163216437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14484.

The product of its digits is 18144, while the sum is 33.

The square root of 163216437 is about 12775.6188499814. The cubic root of 163216437 is about 546.4972291581.

Adding to 163216437 its reverse (734612361), we get a palindrome (897828798).

The spelling of 163216437 in words is "one hundred sixty-three million, two hundred sixteen thousand, four hundred thirty-seven".