21514719 has 4 divisors (see below), whose sum is σ = 28686296. Its totient is φ = 14343144.

The previous prime is 21514687. The next prime is 21514721. The reversal of 21514719 is 91741512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21514719 - 2⁵ = 21514687 is a prime.

It is a super-2 number, since 2×21514719² = 925766267297922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514739) 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, 3585784 + ... + 3585789.

It is an arithmetic number, because the mean of its divisors is an integer number (7171574).

Almost surely, 2^21514719 is an apocalyptic number.

21514719 is a deficient number, since it is larger than the sum of its proper divisors (7171577).

21514719 is an equidigital number, since it uses as much as digits as its factorization.

21514719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7171576.

The product of its digits is 2520, while the sum is 30.

The square root of 21514719 is about 4638.3961667801. The cubic root of 21514719 is about 278.1283286897.

The spelling of 21514719 in words is "twenty-one million, five hundred fourteen thousand, seven hundred nineteen".