33452721 has 6 divisors (see below), whose sum is σ = 48320610. Its totient is φ = 22301808.

The previous prime is 33452717. The next prime is 33452723. The reversal of 33452721 is 12725433.

It can be written as a sum of positive squares in only one way, i.e., 27878400 + 5574321 = 5280^2 + 2361^2 .

It is not a de Polignac number, because 33452721 - 2² = 33452717 is a prime.

It is a super-2 number, since 2×33452721² = 2238169084607682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33452723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1858476 + ... + 1858493.

It is an arithmetic number, because the mean of its divisors is an integer number (8053435).

Almost surely, 2^33452721 is an apocalyptic number.

It is an amenable number.

33452721 is a deficient number, since it is larger than the sum of its proper divisors (14867889).

33452721 is a wasteful number, since it uses less digits than its factorization.

33452721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716975 (or 3716972 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 33452721 is about 5783.8327257970. The cubic root of 33452721 is about 322.2135621445.

The spelling of 33452721 in words is "thirty-three million, four hundred fifty-two thousand, seven hundred twenty-one".