21454522 has 8 divisors (see below), whose sum is σ = 32206356. Its totient is φ = 10719072.

The previous prime is 21454483. The next prime is 21454541. The reversal of 21454522 is 22545412.

It can be written as a sum of positive squares in 2 ways, for example, as 18395521 + 3059001 = 4289^2 + 1749^2 .

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

It is a super-3 number, since 3×21454522³ (a number of 23 digits) contains 333 as substring.

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, 3 + ... + 6550.

Almost surely, 2^21454522 is an apocalyptic number.

21454522 is a deficient number, since it is larger than the sum of its proper divisors (10751834).

21454522 is a wasteful number, since it uses less digits than its factorization.

21454522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8192.

The product of its digits is 3200, while the sum is 25.

The square root of 21454522 is about 4631.9026328281. The cubic root of 21454522 is about 277.8686904675.

Adding to 21454522 its reverse (22545412), we get a palindrome (43999934).

The spelling of 21454522 in words is "twenty-one million, four hundred fifty-four thousand, five hundred twenty-two".