221152650 has 48 divisors (see below), whose sum is σ = 557776800. Its totient is φ = 57972160.

The previous prime is 221152627. The next prime is 221152681. The reversal of 221152650 is 56251122.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221152650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3645 + ... + 21344.

It is an arithmetic number, because the mean of its divisors is an integer number (11620350).

Almost surely, 2^221152650 is an apocalyptic number.

221152650 is an abundant number, since it is smaller than the sum of its proper divisors (336624150).

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

221152650 is a wasteful number, since it uses less digits than its factorization.

221152650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25063 (or 25058 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 221152650 is about 14871.2020361503. The cubic root of 221152650 is about 604.7335301712.

The spelling of 221152650 in words is "two hundred twenty-one million, one hundred fifty-two thousand, six hundred fifty".