6541133931 has 12 divisors (see below), whose sum is σ = 9485071752. Its totient is φ = 4343786496.

The previous prime is 6541133903. The next prime is 6541133953. The reversal of 6541133931 is 1393311456.

It is a happy number.

It is not a de Polignac number, because 6541133931 - 2¹⁴ = 6541117547 is a prime.

It is a super-2 number, since 2×6541133931² = 85572866206559025522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6541132931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411681 + ... + 1416306.

It is an arithmetic number, because the mean of its divisors is an integer number (790422646).

Almost surely, 2^6541133931 is an apocalyptic number.

6541133931 is a deficient number, since it is larger than the sum of its proper divisors (2943937821).

6541133931 is a wasteful number, since it uses less digits than its factorization.

6541133931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828250 (or 2828247 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 6541133931 is about 80877.2769756747. The cubic root of 6541133931 is about 1870.1840431022.

The spelling of 6541133931 in words is "six billion, five hundred forty-one million, one hundred thirty-three thousand, nine hundred thirty-one".