21541022 has 16 divisors (see below), whose sum is σ = 34805760. Its totient is φ = 9965592.

The previous prime is 21541021. The next prime is 21541027. The reversal of 21541022 is 22014512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21541021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4958 + ... + 8225.

It is an arithmetic number, because the mean of its divisors is an integer number (2175360).

Almost surely, 2^21541022 is an apocalyptic number.

21541022 is a deficient number, since it is larger than the sum of its proper divisors (13264738).

21541022 is a wasteful number, since it uses less digits than its factorization.

21541022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13247.

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

The square root of 21541022 is about 4641.2306557636. The cubic root of 21541022 is about 278.2416252380.

Adding to 21541022 its reverse (22014512), we get a palindrome (43555534).

The spelling of 21541022 in words is "twenty-one million, five hundred forty-one thousand, twenty-two".