21622041 has 24 divisors (see below), whose sum is σ = 35819264. Its totient is φ = 12312000.

The previous prime is 21622037. The next prime is 21622061. The reversal of 21622041 is 14022612.

21622041 is a `hidden beast` number, since 2 + 1 + 622 + 0 + 41 = 666.

It is not a de Polignac number, because 21622041 - 2² = 21622037 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21622061) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 28416 + ... + 29166.

Almost surely, 2^21622041 is an apocalyptic number.

21622041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21622041 is a deficient number, since it is larger than the sum of its proper divisors (14197223).

21622041 is a wasteful number, since it uses less digits than its factorization.

21622041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 21622041 is about 4649.9506448994. The cubic root of 21622041 is about 278.5900249068.

Adding to 21622041 its reverse (14022612), we get a palindrome (35644653).

The spelling of 21622041 in words is "twenty-one million, six hundred twenty-two thousand, forty-one".