21614471 has 8 divisors (see below), whose sum is σ = 22406784. Its totient is φ = 20828160.

The previous prime is 21614441. The next prime is 21614491. The reversal of 21614471 is 17441612.

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

It is a cyclic number.

It is not a de Polignac number, because 21614471 - 2¹⁰ = 21613447 is a prime.

It is a super-3 number, since 3×21614471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21614471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21614431) 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, 6611 + ... + 9323.

It is an arithmetic number, because the mean of its divisors is an integer number (2800848).

Almost surely, 2^21614471 is an apocalyptic number.

21614471 is a deficient number, since it is larger than the sum of its proper divisors (792313).

21614471 is a wasteful number, since it uses less digits than its factorization.

21614471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001.

The product of its digits is 1344, while the sum is 26.

The square root of 21614471 is about 4649.1365865072. The cubic root of 21614471 is about 278.5575091257.

The spelling of 21614471 in words is "twenty-one million, six hundred fourteen thousand, four hundred seventy-one".