221093876 has 6 divisors (see below), whose sum is σ = 386914290. Its totient is φ = 110546936.

The previous prime is 221093867. The next prime is 221093893. The reversal of 221093876 is 678390122.

It can be written as a sum of positive squares in only one way, i.e., 194323600 + 26770276 = 13940^2 + 5174^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27636731 + ... + 27636738.

It is an arithmetic number, because the mean of its divisors is an integer number (64485715).

Almost surely, 2^221093876 is an apocalyptic number.

It is an amenable number.

221093876 is a deficient number, since it is larger than the sum of its proper divisors (165820414).

221093876 is a wasteful number, since it uses less digits than its factorization.

221093876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55273473 (or 55273471 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 221093876 is about 14869.2258036523. The cubic root of 221093876 is about 604.6799536671.

The spelling of 221093876 in words is "two hundred twenty-one million, ninety-three thousand, eight hundred seventy-six".