641404131 has 8 divisors (see below), whose sum is σ = 867250944. Its totient is φ = 421580040.

The previous prime is 641404111. The next prime is 641404157. The reversal of 641404131 is 131404146.

641404131 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 641404131 - 2¹⁰ = 641403107 is a prime.

It is a super-2 number, since 2×641404131² = 822798518527730322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641404111) 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, 1505431 + ... + 1505856.

It is an arithmetic number, because the mean of its divisors is an integer number (108406368).

Almost surely, 2^641404131 is an apocalyptic number.

641404131 is a deficient number, since it is larger than the sum of its proper divisors (225846813).

641404131 is a wasteful number, since it uses less digits than its factorization.

641404131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011361.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 641404131 is about 25325.9576521797. The cubic root of 641404131 is about 862.4036466193.

Adding to 641404131 its reverse (131404146), we get a palindrome (772808277).

The spelling of 641404131 in words is "six hundred forty-one million, four hundred four thousand, one hundred thirty-one".