21541112 has 8 divisors (see below), whose sum is σ = 40389600. Its totient is φ = 10770552.

The previous prime is 21541099. The next prime is 21541127. The reversal of 21541112 is 21114512.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1346312 + ... + 1346327.

It is an arithmetic number, because the mean of its divisors is an integer number (5048700).

Almost surely, 2^21541112 is an apocalyptic number.

It is an amenable number.

21541112 is a deficient number, since it is larger than the sum of its proper divisors (18848488).

21541112 is a wasteful number, since it uses less digits than its factorization.

21541112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692645 (or 2692641 counting only the distinct ones).

The product of its digits is 80, while the sum is 17.

The square root of 21541112 is about 4641.2403514578. The cubic root of 21541112 is about 278.2420127422.

Adding to 21541112 its reverse (21114512), we get a palindrome (42655624).

The spelling of 21541112 in words is "twenty-one million, five hundred forty-one thousand, one hundred twelve".