210900022 has 4 divisors (see below), whose sum is σ = 316350036. Its totient is φ = 105450010.

The previous prime is 210900013. The next prime is 210900071. The reversal of 210900022 is 220009012.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 210899969 and 210900005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52725004 + ... + 52725007.

It is an arithmetic number, because the mean of its divisors is an integer number (79087509).

Almost surely, 2^210900022 is an apocalyptic number.

210900022 is a deficient number, since it is larger than the sum of its proper divisors (105450014).

210900022 is a wasteful number, since it uses less digits than its factorization.

210900022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105450013.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 210900022 is about 14522.3972538972. The cubic root of 210900022 is about 595.2401375160.

Adding to 210900022 its reverse (220009012), we get a palindrome (430909034).

The spelling of 210900022 in words is "two hundred ten million, nine hundred thousand, twenty-two".