33720141 has 16 divisors (see below), whose sum is σ = 55336064. Its totient is φ = 17786304.

The previous prime is 33720107. The next prime is 33720179. The reversal of 33720141 is 14102733.

It is not a de Polignac number, because 33720141 - 2⁶ = 33720077 is a prime.

It is a super-2 number, since 2×33720141² = 2274095818119762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33720341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61486 + ... + 62031.

It is an arithmetic number, because the mean of its divisors is an integer number (3458504).

Almost surely, 2^33720141 is an apocalyptic number.

It is an amenable number.

33720141 is a deficient number, since it is larger than the sum of its proper divisors (21615923).

33720141 is a wasteful number, since it uses less digits than its factorization.

33720141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123540.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 33720141 is about 5806.9045971154. The cubic root of 33720141 is about 323.0698727704.

Adding to 33720141 its reverse (14102733), we get a palindrome (47822874).

The spelling of 33720141 in words is "thirty-three million, seven hundred twenty thousand, one hundred forty-one".