221214453759 has 80 divisors (see below), whose sum is σ = 381973771872. Its totient is φ = 126368335872.

The previous prime is 221214453749. The next prime is 221214453799. The reversal of 221214453759 is 957354412122.

221214453759 is a `hidden beast` number, since 2 + 2 + 1 + 21 + 44 + 537 + 59 = 666.

It is not a de Polignac number, because 221214453759 - 2⁴ = 221214453743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221214453749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1222132 + ... + 1391414.

Almost surely, 2^221214453759 is an apocalyptic number.

221214453759 is a deficient number, since it is larger than the sum of its proper divisors (160759318113).

221214453759 is a wasteful number, since it uses less digits than its factorization.

221214453759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169398 (or 169389 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 221214453759 in words is "two hundred twenty-one billion, two hundred fourteen million, four hundred fifty-three thousand, seven hundred fifty-nine".