213998922 has 48 divisors (see below), whose sum is σ = 482856192. Its totient is φ = 71033760.

The previous prime is 213998909. The next prime is 213998999. The reversal of 213998922 is 229899312.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135783 + ... + 137349.

It is an arithmetic number, because the mean of its divisors is an integer number (10059504).

Almost surely, 2^213998922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213998922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241428096).

213998922 is an abundant number, since it is smaller than the sum of its proper divisors (268857270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213998922 is a wasteful number, since it uses less digits than its factorization.

213998922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865 (or 1853 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 213998922 is about 14628.7019929999. The cubic root of 213998922 is about 598.1413986129.

The spelling of 213998922 in words is "two hundred thirteen million, nine hundred ninety-eight thousand, nine hundred twenty-two".