1641333133 has 4 divisors (see below), whose sum is σ = 1790545248. Its totient is φ = 1492121020.

The previous prime is 1641333121. The next prime is 1641333167. The reversal of 1641333133 is 3313331461.

It is a happy number.

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 1641333133 - 2⁵ = 1641333101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641333193) 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, 74606041 + ... + 74606062.

It is an arithmetic number, because the mean of its divisors is an integer number (447636312).

Almost surely, 2^1641333133 is an apocalyptic number.

It is an amenable number.

1641333133 is a deficient number, since it is larger than the sum of its proper divisors (149212115).

1641333133 is a wasteful number, since it uses less digits than its factorization.

1641333133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149212114.

The product of its digits is 5832, while the sum is 28.

The square root of 1641333133 is about 40513.3698055346. The cubic root of 1641333133 is about 1179.5931598033.

Adding to 1641333133 its reverse (3313331461), we get a palindrome (4954664594).

The spelling of 1641333133 in words is "one billion, six hundred forty-one million, three hundred thirty-three thousand, one hundred thirty-three".