213922 has 4 divisors (see below), whose sum is σ = 320886. Its totient is φ = 106960.

The previous prime is 213919. The next prime is 213929. The reversal of 213922 is 229312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 201601 + 12321 = 449^2 + 111^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213922.

It is not an unprimeable number, because it can be changed into a prime (213929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53479 + ... + 53482.

2²¹³⁹²² is an apocalyptic number.

213922 is a deficient number, since it is larger than the sum of its proper divisors (106964).

213922 is a wasteful number, since it uses less digits than its factorization.

213922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106963.

The product of its digits is 216, while the sum is 19.

The square root of 213922 is about 462.5170267136. The cubic root of 213922 is about 59.8069722634.

It can be divided in two parts, 2 and 13922, that added together give a square (13924 = 118²).

The spelling of 213922 in words is "two hundred thirteen thousand, nine hundred twenty-two".