641342533 has 4 divisors (see below), whose sum is σ = 690676588. Its totient is φ = 592008480.

The previous prime is 641342531. The next prime is 641342543. The reversal of 641342533 is 335243146.

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

It can be written as a sum of positive squares in 2 ways, for example, as 114961284 + 526381249 = 10722^2 + 22943^2 .

It is a cyclic number.

It is not a de Polignac number, because 641342533 - 2¹ = 641342531 is a prime.

It is a super-2 number, since 2×641342533² = 822640489269712178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641342495 and 641342504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641342531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24667008 + ... + 24667033.

It is an arithmetic number, because the mean of its divisors is an integer number (172669147).

Almost surely, 2^641342533 is an apocalyptic number.

It is an amenable number.

641342533 is a deficient number, since it is larger than the sum of its proper divisors (49334055).

641342533 is a wasteful number, since it uses less digits than its factorization.

641342533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49334054.

The product of its digits is 25920, while the sum is 31.

The square root of 641342533 is about 25324.7415189178. The cubic root of 641342533 is about 862.3760384193.

Adding to 641342533 its reverse (335243146), we get a palindrome (976585679).

The spelling of 641342533 in words is "six hundred forty-one million, three hundred forty-two thousand, five hundred thirty-three".