641311023 has 8 divisors (see below), whose sum is σ = 856930048. Its totient is φ = 426616344.

The previous prime is 641311007. The next prime is 641311051. The reversal of 641311023 is 320113146.

641311023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641311023 - 2⁴ = 641311007 is a prime.

It is a super-2 number, since 2×641311023² = 822559656442613058, 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 (641311003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229465 + ... + 232242.

It is an arithmetic number, because the mean of its divisors is an integer number (107116256).

Almost surely, 2^641311023 is an apocalyptic number.

641311023 is a deficient number, since it is larger than the sum of its proper divisors (215619025).

641311023 is a wasteful number, since it uses less digits than its factorization.

641311023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462173.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 641311023 is about 25324.1193923895. The cubic root of 641311023 is about 862.3619149660.

Adding to 641311023 its reverse (320113146), we get a palindrome (961424169).

The spelling of 641311023 in words is "six hundred forty-one million, three hundred eleven thousand, twenty-three".