21713772253575 has 48 divisors (see below), whose sum is σ = 36098255563776. Its totient is φ = 11516865561600.

The previous prime is 21713772253561. The next prime is 21713772253601. The reversal of 21713772253575 is 57535227731712.

It is not a de Polignac number, because 21713772253575 - 2¹⁰ = 21713772252551 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15571447 + ... + 16908503.

It is an arithmetic number, because the mean of its divisors is an integer number (752046990912).

Almost surely, 2^{21713772253575} is an apocalyptic number.

21713772253575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21713772253575 is a deficient number, since it is larger than the sum of its proper divisors (14384483310201).

21713772253575 is a wasteful number, since it uses less digits than its factorization.

21713772253575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338264 (or 1338259 counting only the distinct ones).

The product of its digits is 21609000, while the sum is 57.

The spelling of 21713772253575 in words is "twenty-one trillion, seven hundred thirteen billion, seven hundred seventy-two million, two hundred fifty-three thousand, five hundred seventy-five".