221369770 has 16 divisors (see below), whose sum is σ = 405220320. Its totient is φ = 87046864.

The previous prime is 221369761. The next prime is 221369803. The reversal of 221369770 is 77963122.

221369770 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187012 + ... + 188191.

It is an arithmetic number, because the mean of its divisors is an integer number (25326270).

Almost surely, 2^221369770 is an apocalyptic number.

221369770 is a deficient number, since it is larger than the sum of its proper divisors (183850550).

221369770 is a wasteful number, since it uses less digits than its factorization.

221369770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375269.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 221369770 is about 14878.5002604429. The cubic root of 221369770 is about 604.9313675759.

The spelling of 221369770 in words is "two hundred twenty-one million, three hundred sixty-nine thousand, seven hundred seventy".