21231614 has 8 divisors (see below), whose sum is σ = 32163048. Its totient is φ = 10510600.

The previous prime is 21231611. The next prime is 21231629. The reversal of 21231614 is 41613212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52352 + ... + 52755.

It is an arithmetic number, because the mean of its divisors is an integer number (4020381).

Almost surely, 2^21231614 is an apocalyptic number.

21231614 is a deficient number, since it is larger than the sum of its proper divisors (10931434).

21231614 is a wasteful number, since it uses less digits than its factorization.

21231614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105210.

The product of its digits is 288, while the sum is 20.

The square root of 21231614 is about 4607.7775553948. Note that the first 3 decimals coincide. The cubic root of 21231614 is about 276.9030057430.

Adding to 21231614 its reverse (41613212), we get a palindrome (62844826).

The spelling of 21231614 in words is "twenty-one million, two hundred thirty-one thousand, six hundred fourteen".