213223402 has 24 divisors (see below), whose sum is σ = 375485220. Its totient is φ = 90538560.

The previous prime is 213223357. The next prime is 213223403. The reversal of 213223402 is 204322312.

It can be written as a sum of positive squares in 2 ways, for example, as 186896241 + 26327161 = 13671^2 + 5131^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213223402.

It is not an unprimeable number, because it can be changed into a prime (213223403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 702 + ... + 20662.

Almost surely, 2^213223402 is an apocalyptic number.

213223402 is a deficient number, since it is larger than the sum of its proper divisors (162261818).

213223402 is a wasteful number, since it uses less digits than its factorization.

213223402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20086 (or 20079 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 213223402 is about 14602.1711399367. The cubic root of 213223402 is about 597.4179804901.

Adding to 213223402 its reverse (204322312), we get a palindrome (417545714).

The spelling of 213223402 in words is "two hundred thirteen million, two hundred twenty-three thousand, four hundred two".