33721041 has 4 divisors (see below), whose sum is σ = 44961392. Its totient is φ = 22480692.

The previous prime is 33721027. The next prime is 33721049. The reversal of 33721041 is 14012733.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 33721041 - 2⁶ = 33720977 is a prime.

It is a super-2 number, since 2×33721041² = 2274217212247362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33720999 and 33721017.

It is not an unprimeable number, because it can be changed into a prime (33721049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5620171 + ... + 5620176.

It is an arithmetic number, because the mean of its divisors is an integer number (11240348).

Almost surely, 2^33721041 is an apocalyptic number.

It is an amenable number.

33721041 is a deficient number, since it is larger than the sum of its proper divisors (11240351).

33721041 is a wasteful number, since it uses less digits than its factorization.

33721041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11240350.

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

The square root of 33721041 is about 5806.9820905527. The cubic root of 33721041 is about 323.0727470200.

Adding to 33721041 its reverse (14012733), we get a palindrome (47733774).

The spelling of 33721041 in words is "thirty-three million, seven hundred twenty-one thousand, forty-one".