164216537 has 4 divisors (see below), whose sum is σ = 164242176. Its totient is φ = 164190900.

The previous prime is 164216509. The next prime is 164216581. The reversal of 164216537 is 735612461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 164216537 - 2¹⁸ = 163954393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164216497 and 164216506.

It is not an unprimeable number, because it can be changed into a prime (164216597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5912 + ... + 19062.

It is an arithmetic number, because the mean of its divisors is an integer number (41060544).

Almost surely, 2^164216537 is an apocalyptic number.

It is an amenable number.

164216537 is a deficient number, since it is larger than the sum of its proper divisors (25639).

164216537 is a wasteful number, since it uses less digits than its factorization.

164216537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25638.

The product of its digits is 30240, while the sum is 35.

The square root of 164216537 is about 12814.7000355061. The cubic root of 164216537 is about 547.6111679074.

Adding to 164216537 its reverse (735612461), we get a palindrome (899828998).

The spelling of 164216537 in words is "one hundred sixty-four million, two hundred sixteen thousand, five hundred thirty-seven".