404142213 has 4 divisors (see below), whose sum is σ = 538856288. Its totient is φ = 269428140.

The previous prime is 404142203. The next prime is 404142227. The reversal of 404142213 is 312241404.

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 not a de Polignac number, because 404142213 - 2⁵ = 404142181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404142213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404142203) 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, 67357033 + ... + 67357038.

It is an arithmetic number, because the mean of its divisors is an integer number (134714072).

Almost surely, 2^404142213 is an apocalyptic number.

It is an amenable number.

404142213 is a deficient number, since it is larger than the sum of its proper divisors (134714075).

404142213 is a wasteful number, since it uses less digits than its factorization.

404142213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134714074.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 404142213 is about 20103.2886115680. The cubic root of 404142213 is about 739.3409112020.

Adding to 404142213 its reverse (312241404), we get a palindrome (716383617).

The spelling of 404142213 in words is "four hundred four million, one hundred forty-two thousand, two hundred thirteen".