21725253527239 has 2 divisors, whose sum is σ = 21725253527240. Its totient is φ = 21725253527238.

The previous prime is 21725253527207. The next prime is 21725253527269. The reversal of 21725253527239 is 93272535252712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21725253527239 - 2⁵ = 21725253527207 is a prime.

It is a super-2 number, since 2×21725253527239² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21725253527239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21725253527269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10862626763619 + 10862626763620.

It is an arithmetic number, because the mean of its divisors is an integer number (10862626763620).

Almost surely, 2^{21725253527239} is an apocalyptic number.

21725253527239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21725253527239 is an equidigital number, since it uses as much as digits as its factorization.

21725253527239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876000, while the sum is 55.

The spelling of 21725253527239 in words is "twenty-one trillion, seven hundred twenty-five billion, two hundred fifty-three million, five hundred twenty-seven thousand, two hundred thirty-nine".