221377092 has 12 divisors (see below), whose sum is σ = 516546576. Its totient is φ = 73792360.

The previous prime is 221377073. The next prime is 221377109. The reversal of 221377092 is 290773122.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 9224034 + ... + 9224057.

It is an arithmetic number, because the mean of its divisors is an integer number (43045548).

Almost surely, 2^221377092 is an apocalyptic number.

It is an amenable number.

221377092 is an abundant number, since it is smaller than the sum of its proper divisors (295169484).

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

221377092 is a wasteful number, since it uses less digits than its factorization.

221377092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18448098 (or 18448096 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 221377092 is about 14878.7463181546. The cubic root of 221377092 is about 604.9380370482.

The spelling of 221377092 in words is "two hundred twenty-one million, three hundred seventy-seven thousand, ninety-two".