641331 has 8 divisors (see below), whose sum is σ = 950160. Its totient is φ = 427536.

The previous prime is 641327. The next prime is 641371. The reversal of 641331 is 133146.

641331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641331 - 2² = 641327 is a prime.

It is a super-2 number, since 2×641331² = 822610903122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641371) 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, 11850 + ... + 11903.

It is an arithmetic number, because the mean of its divisors is an integer number (118770).

2⁶⁴¹³³¹ is an apocalyptic number.

641331 is a deficient number, since it is larger than the sum of its proper divisors (308829).

641331 is a wasteful number, since it uses less digits than its factorization.

641331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23762 (or 23756 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 641331 is about 800.8314429391. The cubic root of 641331 is about 86.2370869137.

Adding to 641331 its reverse (133146), we get a palindrome (774477).

It can be divided in two parts, 64 and 1331, that multiplied together give a cube (85184 = 44³).

The spelling of 641331 in words is "six hundred forty-one thousand, three hundred thirty-one".