21151041 has 8 divisors (see below), whose sum is σ = 28323360. Its totient is φ = 14039712.

The previous prime is 21151027. The next prime is 21151049. The reversal of 21151041 is 14015112.

It is a happy number.

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

It is not a de Polignac number, because 21151041 - 2¹⁴ = 21134657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21151041.

It is not an unprimeable number, because it can be changed into a prime (21151049) 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, 14431 + ... + 15828.

It is an arithmetic number, because the mean of its divisors is an integer number (3540420).

Almost surely, 2^21151041 is an apocalyptic number.

It is an amenable number.

21151041 is a deficient number, since it is larger than the sum of its proper divisors (7172319).

21151041 is a wasteful number, since it uses less digits than its factorization.

21151041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30495.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 21151041 is about 4599.0260925548. The cubic root of 21151041 is about 276.5522836470.

Adding to 21151041 its reverse (14015112), we get a palindrome (35166153).

The spelling of 21151041 in words is "twenty-one million, one hundred fifty-one thousand, forty-one".