42400213 has 4 divisors (see below), whose sum is σ = 43033120. Its totient is φ = 41767308.

The previous prime is 42400207. The next prime is 42400243. The reversal of 42400213 is 31200424.

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 not a de Polignac number, because 42400213 - 2⁵ = 42400181 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 (42400243) 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, 316353 + ... + 316486.

It is an arithmetic number, because the mean of its divisors is an integer number (10758280).

Almost surely, 2^42400213 is an apocalyptic number.

It is an amenable number.

42400213 is a deficient number, since it is larger than the sum of its proper divisors (632907).

42400213 is an equidigital number, since it uses as much as digits as its factorization.

42400213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632906.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42400213 is about 6511.5445940268. The cubic root of 42400213 is about 348.7032641646.

Adding to 42400213 its reverse (31200424), we get a palindrome (73600637).

The spelling of 42400213 in words is "forty-two million, four hundred thousand, two hundred thirteen".