221325472287 has 24 divisors (see below), whose sum is σ = 321260022720. Its totient is φ = 146828543040.

The previous prime is 221325472241. The next prime is 221325472307. The reversal of 221325472287 is 782274523122.

221325472287 is a `hidden beast` number, since 2 + 2 + 1 + 3 + 2 + 547 + 22 + 87 = 666.

It is not a de Polignac number, because 221325472287 - 2⁶ = 221325472223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221325472187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1435593 + ... + 1582269.

It is an arithmetic number, because the mean of its divisors is an integer number (13385834280).

Almost surely, 2^221325472287 is an apocalyptic number.

221325472287 is a deficient number, since it is larger than the sum of its proper divisors (99934550433).

221325472287 is a wasteful number, since it uses less digits than its factorization.

221325472287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147503 (or 147500 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The spelling of 221325472287 in words is "two hundred twenty-one billion, three hundred twenty-five million, four hundred seventy-two thousand, two hundred eighty-seven".