213221626 has 16 divisors (see below), whose sum is σ = 323040960. Its totient is φ = 105545440.

The previous prime is 213221611. The next prime is 213221647. The reversal of 213221626 is 626122312.

213221626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213221626.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160995 + ... + 162313.

It is an arithmetic number, because the mean of its divisors is an integer number (20190060).

Almost surely, 2^213221626 is an apocalyptic number.

213221626 is a deficient number, since it is larger than the sum of its proper divisors (109819334).

213221626 is a wasteful number, since it uses less digits than its factorization.

213221626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069.

The product of its digits is 1728, while the sum is 25.

The square root of 213221626 is about 14602.1103269356. The cubic root of 213221626 is about 597.4163217959.

Adding to 213221626 its reverse (626122312), we get a palindrome (839343938).

The spelling of 213221626 in words is "two hundred thirteen million, two hundred twenty-one thousand, six hundred twenty-six".