221387795 has 8 divisors (see below), whose sum is σ = 265759920. Its totient is φ = 177047200.

The previous prime is 221387743. The next prime is 221387819. The reversal of 221387795 is 597783122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221387795 - 2²⁴ = 204610579 is a prime.

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, 12245 + ... + 24345.

It is an arithmetic number, because the mean of its divisors is an integer number (33219990).

Almost surely, 2^221387795 is an apocalyptic number.

221387795 is a deficient number, since it is larger than the sum of its proper divisors (44372125).

221387795 is a wasteful number, since it uses less digits than its factorization.

221387795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15765.

The product of its digits is 211680, while the sum is 44.

The square root of 221387795 is about 14879.1059879282. The cubic root of 221387795 is about 604.9477859453.

The spelling of 221387795 in words is "two hundred twenty-one million, three hundred eighty-seven thousand, seven hundred ninety-five".