21140522 has 8 divisors (see below), whose sum is σ = 34150116. Its totient is φ = 9757152.

The previous prime is 21140513. The next prime is 21140549. The reversal of 21140522 is 22504112.

It can be written as a sum of positive squares in 2 ways, for example, as 20620681 + 519841 = 4541^2 + 721^2 .

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

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 21140522.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406523 + ... + 406574.

Almost surely, 2^21140522 is an apocalyptic number.

21140522 is a deficient number, since it is larger than the sum of its proper divisors (13009594).

21140522 is a wasteful number, since it uses less digits than its factorization.

21140522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813112.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21140522 is about 4597.8823386424. The cubic root of 21140522 is about 276.5064303348.

Adding to 21140522 its reverse (22504112), we get a palindrome (43644634).

The spelling of 21140522 in words is "twenty-one million, one hundred forty thousand, five hundred twenty-two".