33431161 has 2 divisors, whose sum is σ = 33431162. Its totient is φ = 33431160.

The previous prime is 33431149. The next prime is 33431173. The reversal of 33431161 is 16113433.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (33431149) and next prime (33431173).

It can be written as a sum of positive squares in only one way, i.e., 25563136 + 7868025 = 5056^2 + 2805^2 .

It is a cyclic number.

It is not a de Polignac number, because 33431161 - 2⁷ = 33431033 is a prime.

It is a super-2 number, since 2×33431161² = 2235285051615842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30431161) 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, 16715580 + 16715581.

It is an arithmetic number, because the mean of its divisors is an integer number (16715581).

Almost surely, 2^33431161 is an apocalyptic number.

It is an amenable number.

33431161 is a deficient number, since it is larger than the sum of its proper divisors (1).

33431161 is an equidigital number, since it uses as much as digits as its factorization.

33431161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

The square root of 33431161 is about 5781.9686093925. The cubic root of 33431161 is about 322.1443259495.

Adding to 33431161 its reverse (16113433), we get a palindrome (49544594).

The spelling of 33431161 in words is "thirty-three million, four hundred thirty-one thousand, one hundred sixty-one".