641216100331 has 16 divisors (see below), whose sum is σ = 650488212000. Its totient is φ = 632026257408.

The previous prime is 641216100299. The next prime is 641216100359. The reversal of 641216100331 is 133001612146.

It is a cyclic number.

It is not a de Polignac number, because 641216100331 - 2⁵ = 641216100299 is a prime.

It is a super-2 number, since 2×641216100331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641216100331.

It is not an unprimeable number, because it can be changed into a prime (641216103331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12169000 + ... + 12221578.

It is an arithmetic number, because the mean of its divisors is an integer number (40655513250).

Almost surely, 2^641216100331 is an apocalyptic number.

641216100331 is a deficient number, since it is larger than the sum of its proper divisors (9272111669).

641216100331 is a wasteful number, since it uses less digits than its factorization.

641216100331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53358.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 641216100331 its reverse (133001612146), we get a palindrome (774217712477).

The spelling of 641216100331 in words is "six hundred forty-one billion, two hundred sixteen million, one hundred thousand, three hundred thirty-one".