166492531 has 2 divisors, whose sum is σ = 166492532. Its totient is φ = 166492530.

The previous prime is 166492523. The next prime is 166492559. The reversal of 166492531 is 135294661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166492531 - 2³ = 166492523 is a prime.

It is a super-2 number, since 2×166492531² = 55439525757571922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166492511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83246265 + 83246266.

It is an arithmetic number, because the mean of its divisors is an integer number (83246266).

Almost surely, 2^166492531 is an apocalyptic number.

166492531 is a deficient number, since it is larger than the sum of its proper divisors (1).

166492531 is an equidigital number, since it uses as much as digits as its factorization.

166492531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 166492531 is about 12903.1984794469. The cubic root of 166492531 is about 550.1294802593.

The spelling of 166492531 in words is "one hundred sixty-six million, four hundred ninety-two thousand, five hundred thirty-one".