33228513 has 6 divisors (see below), whose sum is σ = 47996754. Its totient is φ = 22152336.

The previous prime is 33228499. The next prime is 33228527. The reversal of 33228513 is 31582233.

It is an interprime number because it is at equal distance from previous prime (33228499) and next prime (33228527).

It can be written as a sum of positive squares in only one way, i.e., 17164449 + 16064064 = 4143^2 + 4008^2 .

It is not a de Polignac number, because 33228513 - 2¹³ = 33220321 is a prime.

It is a super-2 number, since 2×33228513² = 2208268152382338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33228563) 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, 1846020 + ... + 1846037.

It is an arithmetic number, because the mean of its divisors is an integer number (7999459).

Almost surely, 2^33228513 is an apocalyptic number.

It is an amenable number.

33228513 is a deficient number, since it is larger than the sum of its proper divisors (14768241).

33228513 is a wasteful number, since it uses less digits than its factorization.

33228513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3692063 (or 3692060 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 33228513 is about 5764.4178370413. The cubic root of 33228513 is about 321.4920975816.

The spelling of 33228513 in words is "thirty-three million, two hundred twenty-eight thousand, five hundred thirteen".