21310422 has 32 divisors (see below), whose sum is σ = 49443072. Its totient is φ = 5997024.

The previous prime is 21310417. The next prime is 21310433. The reversal of 21310422 is 22401312.

It is a super-3 number, since 3×21310422³ (a number of 23 digits) contains 333 as substring.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 973 + ... + 6600.

It is an arithmetic number, because the mean of its divisors is an integer number (1545096).

Almost surely, 2^21310422 is an apocalyptic number.

21310422 is an abundant number, since it is smaller than the sum of its proper divisors (28132650).

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

21310422 is a wasteful number, since it uses less digits than its factorization.

21310422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7652.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21310422 is about 4616.3212626506. The cubic root of 21310422 is about 277.2451877300.

Adding to 21310422 its reverse (22401312), we get a palindrome (43711734).

The spelling of 21310422 in words is "twenty-one million, three hundred ten thousand, four hundred twenty-two".