212622404 has 12 divisors (see below), whose sum is σ = 374587500. Its totient is φ = 105597408.

The previous prime is 212622359. The next prime is 212622409. The reversal of 212622404 is 404226212.

212622404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 110208004 + 102414400 = 10498^2 + 10120^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212622404.

It is not an unprimeable number, because it can be changed into a prime (212622409) 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, 177779 + ... + 178970.

It is an arithmetic number, because the mean of its divisors is an integer number (31215625).

Almost surely, 2^212622404 is an apocalyptic number.

It is an amenable number.

212622404 is a deficient number, since it is larger than the sum of its proper divisors (161965096).

212622404 is a wasteful number, since it uses less digits than its factorization.

212622404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356902 (or 356900 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 212622404 is about 14581.5775552579. The cubic root of 212622404 is about 596.8561521017.

Adding to 212622404 its reverse (404226212), we get a palindrome (616848616).

The spelling of 212622404 in words is "two hundred twelve million, six hundred twenty-two thousand, four hundred four".