33400213 has 12 divisors (see below), whose sum is σ = 42386112. Its totient is φ = 26025720.

The previous prime is 33400193. The next prime is 33400219. The reversal of 33400213 is 31200433.

It is not a de Polignac number, because 33400213 - 2²¹ = 31303061 is a prime.

It is a super-2 number, since 2×33400213² = 2231148456890738, 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 (33400219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30445 + ... + 31522.

It is an arithmetic number, because the mean of its divisors is an integer number (3532176).

Almost surely, 2^33400213 is an apocalyptic number.

It is an amenable number.

33400213 is a deficient number, since it is larger than the sum of its proper divisors (8985899).

33400213 is a wasteful number, since it uses less digits than its factorization.

33400213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61992 (or 61985 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 33400213 is about 5779.2917386130. The cubic root of 33400213 is about 322.0448897719.

Adding to 33400213 its reverse (31200433), we get a palindrome (64600646).

The spelling of 33400213 in words is "thirty-three million, four hundred thousand, two hundred thirteen".