33420851 has 4 divisors (see below), whose sum is σ = 33676104. Its totient is φ = 33165600.

The previous prime is 33420841. The next prime is 33420869. The reversal of 33420851 is 15802433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15802433 = 19 ⋅831707.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33420851 is a prime.

It is a super-2 number, since 2×33420851² = 2233906563128402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33420851.

It is not an unprimeable number, because it can be changed into a prime (33420811) 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, 127430 + ... + 127691.

It is an arithmetic number, because the mean of its divisors is an integer number (8419026).

Almost surely, 2^33420851 is an apocalyptic number.

33420851 is a deficient number, since it is larger than the sum of its proper divisors (255253).

33420851 is a wasteful number, since it uses less digits than its factorization.

33420851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255252.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 33420851 is about 5781.0769757892. The cubic root of 33420851 is about 322.1112066541. Note that the first 3 decimals are identical.

The spelling of 33420851 in words is "thirty-three million, four hundred twenty thousand, eight hundred fifty-one".