164171531 has 2 divisors, whose sum is σ = 164171532. Its totient is φ = 164171530.

The previous prime is 164171519. The next prime is 164171537. The reversal of 164171531 is 135171461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164171531 - 2²² = 159977227 is a prime.

It is a super-2 number, since 2×164171531² = 53904583181767922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164171494 and 164171503.

It is not a weakly prime, because it can be changed into another prime (164171537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82085765 + 82085766.

It is an arithmetic number, because the mean of its divisors is an integer number (82085766).

Almost surely, 2^164171531 is an apocalyptic number.

164171531 is a deficient number, since it is larger than the sum of its proper divisors (1).

164171531 is an equidigital number, since it uses as much as digits as its factorization.

164171531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 29.

The square root of 164171531 is about 12812.9438849938. The cubic root of 164171531 is about 547.5611363240.

The spelling of 164171531 in words is "one hundred sixty-four million, one hundred seventy-one thousand, five hundred thirty-one".