33860221 has 4 divisors (see below), whose sum is σ = 34647712. Its totient is φ = 33072732.

The previous prime is 33860191. The next prime is 33860227. The reversal of 33860221 is 12206833.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12206833 = 17 ⋅718049.

It is a cyclic number.

It is not a de Polignac number, because 33860221 - 2¹³ = 33852029 is a prime.

It is a super-2 number, since 2×33860221² = 2293029132337682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33860227) 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, 393681 + ... + 393766.

It is an arithmetic number, because the mean of its divisors is an integer number (8661928).

Almost surely, 2^33860221 is an apocalyptic number.

It is an amenable number.

33860221 is a deficient number, since it is larger than the sum of its proper divisors (787491).

33860221 is an equidigital number, since it uses as much as digits as its factorization.

33860221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787490.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 33860221 is about 5818.9536000900. The cubic root of 33860221 is about 323.5166196679.

The spelling of 33860221 in words is "thirty-three million, eight hundred sixty thousand, two hundred twenty-one".