221377698 has 20 divisors (see below), whose sum is σ = 496050390. Its totient is φ = 73792512.

The previous prime is 221377687. The next prime is 221377711. The reversal of 221377698 is 896773122.

221377698 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 219721329 + 1656369 = 14823^2 + 1287^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 683103 + ... + 683426.

Almost surely, 2^221377698 is an apocalyptic number.

221377698 is an abundant number, since it is smaller than the sum of its proper divisors (274672692).

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

221377698 is a wasteful number, since it uses less digits than its factorization.

221377698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366543 (or 1366534 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 221377698 is about 14878.7666827597. The cubic root of 221377698 is about 604.9385890356.

The spelling of 221377698 in words is "two hundred twenty-one million, three hundred seventy-seven thousand, six hundred ninety-eight".