166044031 has 2 divisors, whose sum is σ = 166044032. Its totient is φ = 166044030.

The previous prime is 166043993. The next prime is 166044041. The reversal of 166044031 is 130440661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166044031 - 2²⁷ = 31826303 is a prime.

It is a super-2 number, since 2×166044031² = 55141240461457922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166043987 and 166044005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166044041) 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, 83022015 + 83022016.

It is an arithmetic number, because the mean of its divisors is an integer number (83022016).

Almost surely, 2^166044031 is an apocalyptic number.

166044031 is a deficient number, since it is larger than the sum of its proper divisors (1).

166044031 is an equidigital number, since it uses as much as digits as its factorization.

166044031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 166044031 is about 12885.8073476209. The cubic root of 166044031 is about 549.6350537654.

Adding to 166044031 its reverse (130440661), we get a palindrome (296484692).

The spelling of 166044031 in words is "one hundred sixty-six million, forty-four thousand, thirty-one".