213163444 has 24 divisors (see below), whose sum is σ = 405641600. Its totient is φ = 97425504.

The previous prime is 213163441. The next prime is 213163477. The reversal of 213163444 is 444361312.

It is a super-2 number, since 2×213163444² = 90877307715882272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213163441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14544 + ... + 25255.

Almost surely, 2^213163444 is an apocalyptic number.

It is an amenable number.

213163444 is a deficient number, since it is larger than the sum of its proper divisors (192478156).

213163444 is a wasteful number, since it uses less digits than its factorization.

213163444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39919 (or 39917 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 213163444 is about 14600.1179447291. The cubic root of 213163444 is about 597.3619776546.

The spelling of 213163444 in words is "two hundred thirteen million, one hundred sixty-three thousand, four hundred forty-four".