21514263 has 8 divisors (see below), whose sum is σ = 28718448. Its totient is φ = 14326464.

The previous prime is 21514249. The next prime is 21514301. The reversal of 21514263 is 36241512.

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

It is not a de Polignac number, because 21514263 - 2⁴ = 21514247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606 + ... + 6587.

It is an arithmetic number, because the mean of its divisors is an integer number (3589806).

Almost surely, 2^21514263 is an apocalyptic number.

21514263 is a deficient number, since it is larger than the sum of its proper divisors (7204185).

21514263 is an equidigital number, since it uses as much as digits as its factorization.

21514263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8193.

The product of its digits is 1440, while the sum is 24.

The square root of 21514263 is about 4638.3470115980. The cubic root of 21514263 is about 278.1263637184.

Adding to 21514263 its reverse (36241512), we get a palindrome (57755775).

The spelling of 21514263 in words is "twenty-one million, five hundred fourteen thousand, two hundred sixty-three".