221371601 has 8 divisors (see below), whose sum is σ = 241659264. Its totient is φ = 201111120.

The previous prime is 221371583. The next prime is 221371607. The reversal of 221371601 is 106173122.

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

It is a cyclic number.

It is not a de Polignac number, because 221371601 - 2¹⁸ = 221109457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221371607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12680 + ... + 24566.

It is an arithmetic number, because the mean of its divisors is an integer number (30207408).

Almost surely, 2^221371601 is an apocalyptic number.

It is an amenable number.

221371601 is a deficient number, since it is larger than the sum of its proper divisors (20287663).

221371601 is a wasteful number, since it uses less digits than its factorization.

221371601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13591.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 221371601 is about 14878.5617920550. The cubic root of 221371601 is about 604.9330354132.

The spelling of 221371601 in words is "two hundred twenty-one million, three hundred seventy-one thousand, six hundred one".