39442213 has 4 divisors (see below), whose sum is σ = 39463200. Its totient is φ = 39421228.

The previous prime is 39442201. The next prime is 39442241. The reversal of 39442213 is 31224493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39442213 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 (39442283) 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, 7363 + ... + 11536.

It is an arithmetic number, because the mean of its divisors is an integer number (9865800).

Almost surely, 2^39442213 is an apocalyptic number.

It is an amenable number.

39442213 is a deficient number, since it is larger than the sum of its proper divisors (20987).

39442213 is a wasteful number, since it uses less digits than its factorization.

39442213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20986.

The product of its digits is 5184, while the sum is 28.

The square root of 39442213 is about 6280.3035754651. The cubic root of 39442213 is about 340.3980718181.

The spelling of 39442213 in words is "thirty-nine million, four hundred forty-two thousand, two hundred thirteen".