21714471 has 12 divisors (see below), whose sum is σ = 31957848. Its totient is φ = 14202864.

The previous prime is 21714443. The next prime is 21714479. The reversal of 21714471 is 17441712.

21714471 is a `hidden beast` number, since 217 + 1 + 447 + 1 = 666.

It is not a de Polignac number, because 21714471 - 2⁵ = 21714439 is a prime.

It is a super-3 number, since 3×21714471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21714479) 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 11 ways as a sum of consecutive naturals, for example, 22285 + ... + 23238.

It is an arithmetic number, because the mean of its divisors is an integer number (2663154).

Almost surely, 2^21714471 is an apocalyptic number.

21714471 is a deficient number, since it is larger than the sum of its proper divisors (10243377).

21714471 is a wasteful number, since it uses less digits than its factorization.

21714471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45582 (or 45579 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 21714471 is about 4659.8788610864. The cubic root of 21714471 is about 278.9864332248.

The spelling of 21714471 in words is "twenty-one million, seven hundred fourteen thousand, four hundred seventy-one".