164011531 has 2 divisors, whose sum is σ = 164011532. Its totient is φ = 164011530.

The previous prime is 164011513. The next prime is 164011567. The reversal of 164011531 is 135110461.

164011531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (164011513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164011531 - 2⁵ = 164011499 is a prime.

It is a super-2 number, since 2×164011531² = 53799564601927922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164011831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82005765 + 82005766.

It is an arithmetic number, because the mean of its divisors is an integer number (82005766).

Almost surely, 2^164011531 is an apocalyptic number.

164011531 is a deficient number, since it is larger than the sum of its proper divisors (1).

164011531 is an equidigital number, since it uses as much as digits as its factorization.

164011531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 164011531 is about 12806.6986768644. The cubic root of 164011531 is about 547.3831958940.

Adding to 164011531 its reverse (135110461), we get a palindrome (299121992).

The spelling of 164011531 in words is "one hundred sixty-four million, eleven thousand, five hundred thirty-one".