21915314 has 8 divisors (see below), whose sum is σ = 33430320. Its totient is φ = 10771876.

The previous prime is 21915293. The next prime is 21915317. The reversal of 21915314 is 41351912.

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

It is not an unprimeable number, because it can be changed into a prime (21915317) 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 3 ways as a sum of consecutive naturals, for example, 92744 + ... + 92979.

It is an arithmetic number, because the mean of its divisors is an integer number (4178790).

Almost surely, 2^21915314 is an apocalyptic number.

21915314 is a deficient number, since it is larger than the sum of its proper divisors (11515006).

21915314 is a wasteful number, since it uses less digits than its factorization.

21915314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185784.

The product of its digits is 1080, while the sum is 26.

The square root of 21915314 is about 4681.3794975413. The cubic root of 21915314 is about 279.8439351384.

The spelling of 21915314 in words is "twenty-one million, nine hundred fifteen thousand, three hundred fourteen".