402234213 has 4 divisors (see below), whose sum is σ = 536312288. Its totient is φ = 268156140.

The previous prime is 402234167. The next prime is 402234223. The reversal of 402234213 is 312432204.

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 402234213 - 2⁹ = 402233701 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 402234213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402234223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67039033 + ... + 67039038.

It is an arithmetic number, because the mean of its divisors is an integer number (134078072).

Almost surely, 2^402234213 is an apocalyptic number.

It is an amenable number.

402234213 is a deficient number, since it is larger than the sum of its proper divisors (134078075).

402234213 is a wasteful number, since it uses less digits than its factorization.

402234213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134078074.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 402234213 is about 20055.7775466323. Note that the first 3 decimals coincide. The cubic root of 402234213 is about 738.1755720231.

Adding to 402234213 its reverse (312432204), we get a palindrome (714666417).

The spelling of 402234213 in words is "four hundred two million, two hundred thirty-four thousand, two hundred thirteen".