33801921 has 8 divisors (see below), whose sum is σ = 50076960. Its totient is φ = 22534596.

The previous prime is 33801877. The next prime is 33801949. The reversal of 33801921 is 12910833.

It is not a de Polignac number, because 33801921 - 2⁶ = 33801857 is a prime.

It is a super-2 number, since 2×33801921² = 2285139726580482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1251923 = 33801921 / (3 + 3 + 8 + 0 + 1 + 9 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (33801721) 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, 625935 + ... + 625988.

It is an arithmetic number, because the mean of its divisors is an integer number (6259620).

Almost surely, 2^33801921 is an apocalyptic number.

It is an amenable number.

33801921 is a deficient number, since it is larger than the sum of its proper divisors (16275039).

33801921 is a wasteful number, since it uses less digits than its factorization.

33801921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251932 (or 1251926 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 33801921 is about 5813.9419501746. The cubic root of 33801921 is about 323.3308377129.

The spelling of 33801921 in words is "thirty-three million, eight hundred one thousand, nine hundred twenty-one".