221416616440 has 64 divisors (see below), whose sum is σ = 504727524000. Its totient is φ = 87411537408.

The previous prime is 221416616401. The next prime is 221416616441. The reversal of 221416616440 is 44616614122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221416616440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221416616441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817407 + ... + 1054033.

Almost surely, 2^221416616440 is an apocalyptic number.

221416616440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221416616440 is an abundant number, since it is smaller than the sum of its proper divisors (283310907560).

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

221416616440 is a wasteful number, since it uses less digits than its factorization.

221416616440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236944 (or 236940 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 221416616440 in words is "two hundred twenty-one billion, four hundred sixteen million, six hundred sixteen thousand, four hundred forty".