33640161 has 8 divisors (see below), whose sum is σ = 47492064. Its totient is φ = 21107520.

The previous prime is 33640157. The next prime is 33640183. The reversal of 33640161 is 16104633.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33640161 - 2² = 33640157 is a prime.

It is a super-2 number, since 2×33640161² = 2263320864211842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33640111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329755 + ... + 329856.

It is an arithmetic number, because the mean of its divisors is an integer number (5936508).

Almost surely, 2^33640161 is an apocalyptic number.

It is an amenable number.

33640161 is a deficient number, since it is larger than the sum of its proper divisors (13851903).

33640161 is a wasteful number, since it uses less digits than its factorization.

33640161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659631.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 33640161 is about 5800.0138792937. The cubic root of 33640161 is about 322.8142433089.

Adding to 33640161 its reverse (16104633), we get a palindrome (49744794).

The spelling of 33640161 in words is "thirty-three million, six hundred forty thousand, one hundred sixty-one".