21310222 has 8 divisors (see below), whose sum is σ = 32053536. Its totient is φ = 10625712.

The previous prime is 21310207. The next prime is 21310243. The reversal of 21310222 is 22201312.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 13783 + ... + 15250.

It is an arithmetic number, because the mean of its divisors is an integer number (4006692).

Almost surely, 2^21310222 is an apocalyptic number.

21310222 is a deficient number, since it is larger than the sum of its proper divisors (10743314).

21310222 is a wasteful number, since it uses less digits than its factorization.

21310222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29402.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21310222 is about 4616.2996003293. The cubic root of 21310222 is about 277.2443204046.

Adding to 21310222 its reverse (22201312), we get a palindrome (43511534).

The spelling of 21310222 in words is "twenty-one million, three hundred ten thousand, two hundred twenty-two".