164531522531 has 4 divisors (see below), whose sum is σ = 164533755672. Its totient is φ = 164529289392.

The previous prime is 164531522521. The next prime is 164531522563. The reversal of 164531522531 is 135225135461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164531522531 is a prime.

It is a super-2 number, since 2×164531522531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164531522521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002146 + ... + 1154711.

It is an arithmetic number, because the mean of its divisors is an integer number (41133438918).

Almost surely, 2^164531522531 is an apocalyptic number.

164531522531 is a deficient number, since it is larger than the sum of its proper divisors (2233141).

164531522531 is an equidigital number, since it uses as much as digits as its factorization.

164531522531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233140.

The product of its digits is 108000, while the sum is 38.

Adding to 164531522531 its reverse (135225135461), we get a palindrome (299756657992).

The spelling of 164531522531 in words is "one hundred sixty-four billion, five hundred thirty-one million, five hundred twenty-two thousand, five hundred thirty-one".