164135431 has 2 divisors, whose sum is σ = 164135432. Its totient is φ = 164135430.

The previous prime is 164135417. The next prime is 164135437. The reversal of 164135431 is 134531461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164135431 - 2¹⁹ = 163611143 is a prime.

It is a super-2 number, since 2×164135431² = 53880879419111522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164135431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164135437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82067715 + 82067716.

It is an arithmetic number, because the mean of its divisors is an integer number (82067716).

Almost surely, 2^164135431 is an apocalyptic number.

164135431 is a deficient number, since it is larger than the sum of its proper divisors (1).

164135431 is an equidigital number, since it uses as much as digits as its factorization.

164135431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 164135431 is about 12811.5350758603. The cubic root of 164135431 is about 547.5209986178.

Adding to 164135431 its reverse (134531461), we get a palindrome (298666892).

The spelling of 164135431 in words is "one hundred sixty-four million, one hundred thirty-five thousand, four hundred thirty-one".