1601602221 has 8 divisors (see below), whose sum is σ = 2180905344. Its totient is φ = 1045016960.

The previous prime is 1601602213. The next prime is 1601602243. The reversal of 1601602221 is 1222061061.

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 1601602221 - 2³ = 1601602213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601602021) 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, 5679300 + ... + 5679581.

It is an arithmetic number, because the mean of its divisors is an integer number (272613168).

Almost surely, 2^1601602221 is an apocalyptic number.

It is an amenable number.

1601602221 is a deficient number, since it is larger than the sum of its proper divisors (579303123).

1601602221 is a wasteful number, since it uses less digits than its factorization.

1601602221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11358931.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1601602221 is about 40020.0227511180. The cubic root of 1601602221 is about 1169.9973752589.

Adding to 1601602221 its reverse (1222061061), we get a palindrome (2823663282).

The spelling of 1601602221 in words is "one billion, six hundred one million, six hundred two thousand, two hundred twenty-one".