164643131 has 8 divisors (see below), whose sum is σ = 173472000. Its totient is φ = 155953512.

The previous prime is 164643119. The next prime is 164643161. The reversal of 164643131 is 131346461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164643131 - 2⁶ = 164643067 is a prime.

It is a super-2 number, since 2×164643131² = 54214721170966322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164643094 and 164643103.

It is not an unprimeable number, because it can be changed into a prime (164643161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32381 + ... + 37118.

It is an arithmetic number, because the mean of its divisors is an integer number (21684000).

Almost surely, 2^164643131 is an apocalyptic number.

164643131 is a deficient number, since it is larger than the sum of its proper divisors (8828869).

164643131 is a wasteful number, since it uses less digits than its factorization.

164643131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69625.

The product of its digits is 5184, while the sum is 29.

The square root of 164643131 is about 12831.3339524774. Note that the first 3 decimals coincide. The cubic root of 164643131 is about 548.0849440757.

Adding to 164643131 its reverse (131346461), we get a palindrome (295989592).

The spelling of 164643131 in words is "one hundred sixty-four million, six hundred forty-three thousand, one hundred thirty-one".