33221572 has 12 divisors (see below), whose sum is σ = 58193856. Its totient is φ = 16594760.

The previous prime is 33221567. The next prime is 33221579. The reversal of 33221572 is 27512233.

It is a super-2 number, since 2×33221572² = 2207345692302368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33221579) 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, 1497 + ... + 8287.

It is an arithmetic number, because the mean of its divisors is an integer number (4849488).

Almost surely, 2^33221572 is an apocalyptic number.

It is an amenable number.

33221572 is a deficient number, since it is larger than the sum of its proper divisors (24972284).

33221572 is a wasteful number, since it uses less digits than its factorization.

33221572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8018 (or 8016 counting only the distinct ones).

The product of its digits is 2520, while the sum is 25.

The square root of 33221572 is about 5763.8157500045. The cubic root of 33221572 is about 321.4697108637.

It can be divided in two parts, 332 and 21572, that added together give a square (21904 = 148²).

The spelling of 33221572 in words is "thirty-three million, two hundred twenty-one thousand, five hundred seventy-two".