131643011 has 4 divisors (see below), whose sum is σ = 131700024. Its totient is φ = 131586000.

The previous prime is 131642971. The next prime is 131643013. The reversal of 131643011 is 110346131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131643011 - 2⁶ = 131642947 is a prime.

It is a super-2 number, since 2×131643011² = 34659764690292242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131643013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24890 + ... + 29711.

It is an arithmetic number, because the mean of its divisors is an integer number (32925006).

Almost surely, 2^131643011 is an apocalyptic number.

131643011 is a deficient number, since it is larger than the sum of its proper divisors (57013).

131643011 is an equidigital number, since it uses as much as digits as its factorization.

131643011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57012.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 131643011 is about 11473.5788226691. The cubic root of 131643011 is about 508.7049173348.

Adding to 131643011 its reverse (110346131), we get a palindrome (241989142).

The spelling of 131643011 in words is "one hundred thirty-one million, six hundred forty-three thousand, eleven".