164242571 has 2 divisors, whose sum is σ = 164242572. Its totient is φ = 164242570.

The previous prime is 164242543. The next prime is 164242579. The reversal of 164242571 is 175242461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164242571 is a prime.

It is not a weakly prime, because it can be changed into another prime (164242579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82121285 + 82121286.

It is an arithmetic number, because the mean of its divisors is an integer number (82121286).

Almost surely, 2^164242571 is an apocalyptic number.

164242571 is a deficient number, since it is larger than the sum of its proper divisors (1).

164242571 is an equidigital number, since it uses as much as digits as its factorization.

164242571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 164242571 is about 12815.7157818048. The cubic root of 164242571 is about 547.6401048141.

The spelling of 164242571 in words is "one hundred sixty-four million, two hundred forty-two thousand, five hundred seventy-one".