164633531 has 2 divisors, whose sum is σ = 164633532. Its totient is φ = 164633530.

The previous prime is 164633519. The next prime is 164633533. The reversal of 164633531 is 135336461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164633531 - 2¹⁸ = 164371387 is a prime.

It is a super-2 number, since 2×164633531² = 54208399059055922, which contains 22 as substring.

Together with 164633533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164633533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82316765 + 82316766.

It is an arithmetic number, because the mean of its divisors is an integer number (82316766).

Almost surely, 2^164633531 is an apocalyptic number.

164633531 is a deficient number, since it is larger than the sum of its proper divisors (1).

164633531 is an equidigital number, since it uses as much as digits as its factorization.

164633531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 164633531 is about 12830.9598627694. The cubic root of 164633531 is about 548.0742913026.

Adding to 164633531 its reverse (135336461), we get a palindrome (299969992).

The spelling of 164633531 in words is "one hundred sixty-four million, six hundred thirty-three thousand, five hundred thirty-one".