42133213 has 4 divisors (see below), whose sum is σ = 42239740. Its totient is φ = 42026688.

The previous prime is 42133193. The next prime is 42133219. The reversal of 42133213 is 31233124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24383844 + 17749369 = 4938^2 + 4213^2 .

It is a cyclic number.

It is not a de Polignac number, because 42133213 - 2²⁵ = 8578781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42133219) 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, 52668 + ... + 53461.

It is an arithmetic number, because the mean of its divisors is an integer number (10559935).

Almost surely, 2^42133213 is an apocalyptic number.

It is an amenable number.

42133213 is a deficient number, since it is larger than the sum of its proper divisors (106527).

42133213 is a wasteful number, since it uses less digits than its factorization.

42133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106526.

The product of its digits is 432, while the sum is 19.

The square root of 42133213 is about 6491.0101679169. The cubic root of 42133213 is about 347.9697781699.

Adding to 42133213 its reverse (31233124), we get a palindrome (73366337).

The spelling of 42133213 in words is "forty-two million, one hundred thirty-three thousand, two hundred thirteen".