21714305652551 has 4 divisors (see below), whose sum is σ = 22020140943504. Its totient is φ = 21408470361600.

The previous prime is 21714305652547. The next prime is 21714305652583. The reversal of 21714305652551 is 15525650341712.

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

It is a cyclic number.

It is not a de Polignac number, because 21714305652551 - 2² = 21714305652547 is a prime.

It is a super-2 number, since 2×21714305652551² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21714305652496 and 21714305652505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21714305652511) 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, 152917645370 + ... + 152917645511.

It is an arithmetic number, because the mean of its divisors is an integer number (5505035235876).

Almost surely, 2^{21714305652551} is an apocalyptic number.

21714305652551 is a deficient number, since it is larger than the sum of its proper divisors (305835290953).

21714305652551 is an equidigital number, since it uses as much as digits as its factorization.

21714305652551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305835290952.

The product of its (nonzero) digits is 1260000, while the sum is 47.

The spelling of 21714305652551 in words is "twenty-one trillion, seven hundred fourteen billion, three hundred five million, six hundred fifty-two thousand, five hundred fifty-one".