221431421416265 has 32 divisors (see below), whose sum is σ = 277658309064960. Its totient is φ = 169206408290304.

The previous prime is 221431421416207. The next prime is 221431421416267. The reversal of 221431421416265 is 562614124134122.

It is not a de Polignac number, because 221431421416265 - 2¹⁸ = 221431421154121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221431421416267) 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, 285871577 + ... + 286645113.

It is an arithmetic number, because the mean of its divisors is an integer number (8676822158280).

Almost surely, 2^{221431421416265} is an apocalyptic number.

It is an amenable number.

221431421416265 is a deficient number, since it is larger than the sum of its proper divisors (56226887648695).

221431421416265 is a wasteful number, since it uses less digits than its factorization.

221431421416265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777041.

The product of its digits is 552960, while the sum is 44.

The spelling of 221431421416265 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred twenty-one million, four hundred sixteen thousand, two hundred sixty-five".