213404522 has 4 divisors (see below), whose sum is σ = 320106786. Its totient is φ = 106702260.

The previous prime is 213404501. The next prime is 213404531. The reversal of 213404522 is 225404312.

It is a happy number.

213404522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 149548441 + 63856081 = 12229^2 + 7991^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53351129 + ... + 53351132.

Almost surely, 2^213404522 is an apocalyptic number.

213404522 is a deficient number, since it is larger than the sum of its proper divisors (106702264).

213404522 is a wasteful number, since it uses less digits than its factorization.

213404522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106702263.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 213404522 is about 14608.3716409462. The cubic root of 213404522 is about 597.5870890721.

Adding to 213404522 its reverse (225404312), we get a palindrome (438808834).

The spelling of 213404522 in words is "two hundred thirteen million, four hundred four thousand, five hundred twenty-two".