1601213233 has 2 divisors, whose sum is σ = 1601213234. Its totient is φ = 1601213232.

The previous prime is 1601213219. The next prime is 1601213261. The reversal of 1601213233 is 3323121061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 832149409 + 769063824 = 28847^2 + 27732^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601213233 - 2⁹ = 1601212721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601213203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800606616 + 800606617.

It is an arithmetic number, because the mean of its divisors is an integer number (800606617).

Almost surely, 2^1601213233 is an apocalyptic number.

It is an amenable number.

1601213233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601213233 is an equidigital number, since it uses as much as digits as its factorization.

1601213233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1601213233 is about 40015.1625387177. The cubic root of 1601213233 is about 1169.9026468294.

Adding to 1601213233 its reverse (3323121061), we get a palindrome (4924334294).

The spelling of 1601213233 in words is "one billion, six hundred one million, two hundred thirteen thousand, two hundred thirty-three".