221443714421640 has 96 divisors (see below), whose sum is σ = 720026348460120. Its totient is φ = 59024229356544.

The previous prime is 221443714421623. The next prime is 221443714421647. The reversal of 221443714421640 is 46124417344122.

221443714421640 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 43 + 7 + 1 + 442 + 164 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 161859919766724 + 59583794654916 = 12722418^2 + 7719054^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (221443714421647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142077087 + ... + 143627246.

Almost surely, 2^{221443714421640} is an apocalyptic number.

221443714421640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221443714421640 is an abundant number, since it is smaller than the sum of its proper divisors (498582634038480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221443714421640 is a wasteful number, since it uses less digits than its factorization.

221443714421640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285706503 (or 285706496 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 45.

The spelling of 221443714421640 in words is "two hundred twenty-one trillion, four hundred forty-three billion, seven hundred fourteen million, four hundred twenty-one thousand, six hundred forty".