21325122731559 has 32 divisors (see below), whose sum is σ = 29605519360000. Its totient is φ = 13638873830400.

The previous prime is 21325122731551. The next prime is 21325122731569. The reversal of 21325122731559 is 95513722152312.

It is not a de Polignac number, because 21325122731559 - 2³ = 21325122731551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21325122731551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14029149 + ... + 15474729.

It is an arithmetic number, because the mean of its divisors is an integer number (925172480000).

Almost surely, 2^{21325122731559} is an apocalyptic number.

21325122731559 is a deficient number, since it is larger than the sum of its proper divisors (8280396628441).

21325122731559 is a wasteful number, since it uses less digits than its factorization.

21325122731559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446991.

The product of its digits is 1134000, while the sum is 48.

The spelling of 21325122731559 in words is "twenty-one trillion, three hundred twenty-five billion, one hundred twenty-two million, seven hundred thirty-one thousand, five hundred fifty-nine".