221452466421525 has 12 divisors (see below), whose sum is σ = 366134744483712. Its totient is φ = 118107982091440.

The previous prime is 221452466421499. The next prime is 221452466421581. The reversal of 221452466421525 is 525124664254122.

It is not a de Polignac number, because 221452466421525 - 2⁵ = 221452466421493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1476349776069 + ... + 1476349776218.

It is an arithmetic number, because the mean of its divisors is an integer number (30511228706976).

Almost surely, 2^{221452466421525} is an apocalyptic number.

221452466421525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221452466421525 is a deficient number, since it is larger than the sum of its proper divisors (144682278062187).

221452466421525 is a wasteful number, since it uses less digits than its factorization.

221452466421525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952699552300 (or 2952699552295 counting only the distinct ones).

The product of its digits is 9216000, while the sum is 51.

The spelling of 221452466421525 in words is "two hundred twenty-one trillion, four hundred fifty-two billion, four hundred sixty-six million, four hundred twenty-one thousand, five hundred twenty-five".