641313501 has 4 divisors (see below), whose sum is σ = 855084672. Its totient is φ = 427542332.

The previous prime is 641313473. The next prime is 641313521. The reversal of 641313501 is 105313146.

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 641313501 - 2²¹ = 639216349 is a prime.

It is a super-2 number, since 2×641313501² = 822566013129754002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641313521) 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, 106885581 + ... + 106885586.

It is an arithmetic number, because the mean of its divisors is an integer number (213771168).

Almost surely, 2^641313501 is an apocalyptic number.

It is an amenable number.

641313501 is a deficient number, since it is larger than the sum of its proper divisors (213771171).

641313501 is a wasteful number, since it uses less digits than its factorization.

641313501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213771170.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 641313501 is about 25324.1683180317. The cubic root of 641313501 is about 862.3630256752.

Adding to 641313501 its reverse (105313146), we get a palindrome (746626647).

The spelling of 641313501 in words is "six hundred forty-one million, three hundred thirteen thousand, five hundred one".