21421625325 has 24 divisors (see below), whose sum is σ = 35431140000. Its totient is φ = 11420333760.

The previous prime is 21421625321. The next prime is 21421625369. The reversal of 21421625325 is 52352612412.

It is a happy number.

It is not a de Polignac number, because 21421625325 - 2² = 21421625321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21421625321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138051 + ... + 248799.

It is an arithmetic number, because the mean of its divisors is an integer number (1476297500).

Almost surely, 2^21421625325 is an apocalyptic number.

21421625325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21421625325 is a deficient number, since it is larger than the sum of its proper divisors (14009514675).

21421625325 is a wasteful number, since it uses less digits than its factorization.

21421625325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113341 (or 113336 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The spelling of 21421625325 in words is "twenty-one billion, four hundred twenty-one million, six hundred twenty-five thousand, three hundred twenty-five".