21250226644325 has 48 divisors (see below), whose sum is σ = 31265735341056. Its totient is φ = 14020020518400.

The previous prime is 21250226644321. The next prime is 21250226644333. The reversal of 21250226644325 is 52344662205212.

It is not a de Polignac number, because 21250226644325 - 2² = 21250226644321 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21250226644321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10382552 + ... + 12259601.

It is an arithmetic number, because the mean of its divisors is an integer number (651369486272).

Almost surely, 2^{21250226644325} is an apocalyptic number.

21250226644325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21250226644325 is a deficient number, since it is larger than the sum of its proper divisors (10015508696731).

21250226644325 is a wasteful number, since it uses less digits than its factorization.

21250226644325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22642374 (or 22642369 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 44.

Adding to 21250226644325 its reverse (52344662205212), we get a palindrome (73594888849537).

The spelling of 21250226644325 in words is "twenty-one trillion, two hundred fifty billion, two hundred twenty-six million, six hundred forty-four thousand, three hundred twenty-five".