21114165 has 8 divisors (see below), whose sum is σ = 33782688. Its totient is φ = 11260880.

The previous prime is 21114157. The next prime is 21114167. The reversal of 21114165 is 56141112.

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

It is not a de Polignac number, because 21114165 - 2³ = 21114157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114167) 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, 703791 + ... + 703820.

It is an arithmetic number, because the mean of its divisors is an integer number (4222836).

Almost surely, 2^21114165 is an apocalyptic number.

It is an amenable number.

21114165 is a deficient number, since it is larger than the sum of its proper divisors (12668523).

21114165 is a wasteful number, since it uses less digits than its factorization.

21114165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407619.

The product of its digits is 240, while the sum is 21.

The square root of 21114165 is about 4595.0152339247. The cubic root of 21114165 is about 276.3914708460.

Adding to 21114165 its reverse (56141112), we get a palindrome (77255277).

The spelling of 21114165 in words is "twenty-one million, one hundred fourteen thousand, one hundred sixty-five".