213222638 has 32 divisors (see below), whose sum is σ = 339663456. Its totient is φ = 100251648.

The previous prime is 213222631. The next prime is 213222641. The reversal of 213222638 is 836222312.

It is a self number, because there is not a number n which added to its sum of digits gives 213222638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213222631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359270 + ... + 359862.

It is an arithmetic number, because the mean of its divisors is an integer number (10614483).

Almost surely, 2^213222638 is an apocalyptic number.

213222638 is a deficient number, since it is larger than the sum of its proper divisors (126440818).

213222638 is a wasteful number, since it uses less digits than its factorization.

213222638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its digits is 6912, while the sum is 29.

The square root of 213222638 is about 14602.1449794200. The cubic root of 213222638 is about 597.4172669539.

The spelling of 213222638 in words is "two hundred thirteen million, two hundred twenty-two thousand, six hundred thirty-eight".