221512461241325 has 12 divisors (see below), whose sum is σ = 275815184112468. Its totient is φ = 176474657913600.

The previous prime is 221512461241297. The next prime is 221512461241333. The reversal of 221512461241325 is 523142164215122.

It can be written as a sum of positive squares in 6 ways, for example, as 10726954691209 + 210785506550116 = 3275203^2 + 14518454^2 .

It is not a de Polignac number, because 221512461241325 - 2²⁴ = 221512444464109 is a prime.

It is a Duffinian number.

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, 18382770842 + ... + 18382782891.

It is an arithmetic number, because the mean of its divisors is an integer number (22984598676039).

Almost surely, 2^{221512461241325} is an apocalyptic number.

221512461241325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221512461241325 is a deficient number, since it is larger than the sum of its proper divisors (54302722871143).

221512461241325 is a wasteful number, since it uses less digits than its factorization.

221512461241325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36765553984 (or 36765553979 counting only the distinct ones).

The product of its digits is 230400, while the sum is 41.

The spelling of 221512461241325 in words is "two hundred twenty-one trillion, five hundred twelve billion, four hundred sixty-one million, two hundred forty-one thousand, three hundred twenty-five".