221250155764 has 72 divisors (see below), whose sum is σ = 440587929600. Its totient is φ = 97028500800.

The previous prime is 221250155761. The next prime is 221250155813. The reversal of 221250155764 is 467551052122.

It is a happy number.

221250155764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221250155761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21877069 + ... + 21887179.

It is an arithmetic number, because the mean of its divisors is an integer number (6119276800).

Almost surely, 2^221250155764 is an apocalyptic number.

It is an amenable number.

221250155764 is a deficient number, since it is larger than the sum of its proper divisors (219337773836).

221250155764 is a wasteful number, since it uses less digits than its factorization.

221250155764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11725 (or 11712 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 221250155764 in words is "two hundred twenty-one billion, two hundred fifty million, one hundred fifty-five thousand, seven hundred sixty-four".