641224541131 has 2 divisors, whose sum is σ = 641224541132. Its totient is φ = 641224541130.

The previous prime is 641224541129. The next prime is 641224541141. The reversal of 641224541131 is 131145422146.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641224541131 - 2¹ = 641224541129 is a prime.

It is a super-2 number, since 2×641224541131² (a number of 24 digits) contains 22 as substring.

Together with 641224541129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (641224541141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320612270565 + 320612270566.

It is an arithmetic number, because the mean of its divisors is an integer number (320612270566).

Almost surely, 2^641224541131 is an apocalyptic number.

641224541131 is a deficient number, since it is larger than the sum of its proper divisors (1).

641224541131 is an equidigital number, since it uses as much as digits as its factorization.

641224541131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 34.

Adding to 641224541131 its reverse (131145422146), we get a palindrome (772369963277).

The spelling of 641224541131 in words is "six hundred forty-one billion, two hundred twenty-four million, five hundred forty-one thousand, one hundred thirty-one".