641412231531 has 8 divisors (see below), whose sum is σ = 855221790720. Its totient is φ = 427605413352.

The previous prime is 641412231517. The next prime is 641412231533. The reversal of 641412231531 is 135132214146.

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

It is not a de Polignac number, because 641412231531 - 2¹⁰ = 641412230507 is a prime.

It is a super-2 number, since 2×641412231531² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641412231492 and 641412231501.

It is not an unprimeable number, because it can be changed into a prime (641412231533) 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, 56935 + ... + 1134048.

It is an arithmetic number, because the mean of its divisors is an integer number (106902723840).

Almost surely, 2^641412231531 is an apocalyptic number.

641412231531 is a deficient number, since it is larger than the sum of its proper divisors (213809559189).

641412231531 is a wasteful number, since it uses less digits than its factorization.

641412231531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370505.

The product of its digits is 17280, while the sum is 33.

Adding to 641412231531 its reverse (135132214146), we get a palindrome (776544445677).

The spelling of 641412231531 in words is "six hundred forty-one billion, four hundred twelve million, two hundred thirty-one thousand, five hundred thirty-one".