33140161 has 6 divisors (see below), whose sum is σ = 34976562. Its totient is φ = 31395600.

The previous prime is 33140153. The next prime is 33140167. The reversal of 33140161 is 16104133.

It can be written as a sum of positive squares in only one way, i.e., 27499536 + 5640625 = 5244^2 + 2375^2 .

It is not a de Polignac number, because 33140161 - 2³ = 33140153 is a prime.

It is a super-2 number, since 2×33140161² = 2196540542211842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33140167) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45540 + ... + 46261.

It is an arithmetic number, because the mean of its divisors is an integer number (5829427).

Almost surely, 2^33140161 is an apocalyptic number.

It is an amenable number.

33140161 is a deficient number, since it is larger than the sum of its proper divisors (1836401).

33140161 is an equidigital number, since it uses as much as digits as its factorization.

33140161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91839 (or 91820 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 33140161 is about 5756.7491694532. The cubic root of 33140161 is about 321.2069039374.

Adding to 33140161 its reverse (16104133), we get a palindrome (49244294).

The spelling of 33140161 in words is "thirty-three million, one hundred forty thousand, one hundred sixty-one".