641132311 has 4 divisors (see below), whose sum is σ = 654773472. Its totient is φ = 627491152.

The previous prime is 641132299. The next prime is 641132329. The reversal of 641132311 is 113231146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641132311 - 2²³ = 632743703 is a prime.

It is a super-2 number, since 2×641132311² = 822101280416401442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641132341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6820510 + ... + 6820603.

It is an arithmetic number, because the mean of its divisors is an integer number (163693368).

Almost surely, 2^641132311 is an apocalyptic number.

641132311 is a deficient number, since it is larger than the sum of its proper divisors (13641161).

641132311 is a wasteful number, since it uses less digits than its factorization.

641132311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13641160.

The product of its digits is 432, while the sum is 22.

The square root of 641132311 is about 25320.5906526684. The cubic root of 641132311 is about 862.2818036863.

Adding to 641132311 its reverse (113231146), we get a palindrome (754363457).

The spelling of 641132311 in words is "six hundred forty-one million, one hundred thirty-two thousand, three hundred eleven".