164543631 has 8 divisors (see below), whose sum is σ = 250733184. Its totient is φ = 94024920.

The previous prime is 164543623. The next prime is 164543647. The reversal of 164543631 is 136345461.

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

It is not a de Polignac number, because 164543631 - 2³ = 164543623 is a prime.

It is a super-2 number, since 2×164543631² = 54149213005328322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164543592 and 164543601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164543611) 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 7 ways as a sum of consecutive naturals, for example, 3917685 + ... + 3917726.

It is an arithmetic number, because the mean of its divisors is an integer number (31341648).

Almost surely, 2^164543631 is an apocalyptic number.

164543631 is a deficient number, since it is larger than the sum of its proper divisors (86189553).

164543631 is an equidigital number, since it uses as much as digits as its factorization.

164543631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7835421.

The product of its digits is 25920, while the sum is 33.

The square root of 164543631 is about 12827.4561390792. The cubic root of 164543631 is about 547.9745124186.

The spelling of 164543631 in words is "one hundred sixty-four million, five hundred forty-three thousand, six hundred thirty-one".