221665245034750 has 128 divisors (see below), whose sum is σ = 462568006637568. Its totient is φ = 78846886960000.

The previous prime is 221665245034711. The next prime is 221665245034777. The reversal of 221665245034750 is 57430542566122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 233598252 + ... + 234545248.

It is an arithmetic number, because the mean of its divisors is an integer number (3613812551856).

Almost surely, 2^{221665245034750} is an apocalyptic number.

221665245034750 is an abundant number, since it is smaller than the sum of its proper divisors (240902761602818).

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

221665245034750 is a wasteful number, since it uses less digits than its factorization.

221665245034750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948883 (or 948873 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 52.

The spelling of 221665245034750 in words is "two hundred twenty-one trillion, six hundred sixty-five billion, two hundred forty-five million, thirty-four thousand, seven hundred fifty".