1641220233 has 4 divisors (see below), whose sum is σ = 2188293648. Its totient is φ = 1094146820.

The previous prime is 1641220219. The next prime is 1641220241. The reversal of 1641220233 is 3320221461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1641220233 - 2⁸ = 1641219977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1641220333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273536703 + ... + 273536708.

It is an arithmetic number, because the mean of its divisors is an integer number (547073412).

Almost surely, 2^1641220233 is an apocalyptic number.

It is an amenable number.

1641220233 is a deficient number, since it is larger than the sum of its proper divisors (547073415).

1641220233 is an equidigital number, since it uses as much as digits as its factorization.

1641220233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547073414.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1641220233 is about 40511.9764143889. The cubic root of 1641220233 is about 1179.5661128623.

Adding to 1641220233 its reverse (3320221461), we get a palindrome (4961441694).

The spelling of 1641220233 in words is "one billion, six hundred forty-one million, two hundred twenty thousand, two hundred thirty-three".