131232511 has 4 divisors (see below), whose sum is σ = 135757800. Its totient is φ = 126707224.

The previous prime is 131232499. The next prime is 131232527. The reversal of 131232511 is 115232131.

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 131232511 - 2⁷ = 131232383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131232551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2262601 + ... + 2262658.

It is an arithmetic number, because the mean of its divisors is an integer number (33939450).

Almost surely, 2^131232511 is an apocalyptic number.

131232511 is a deficient number, since it is larger than the sum of its proper divisors (4525289).

131232511 is an equidigital number, since it uses as much as digits as its factorization.

131232511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525288.

The product of its digits is 180, while the sum is 19.

The square root of 131232511 is about 11455.6759294247. The cubic root of 131232511 is about 508.1756050163.

Adding to 131232511 its reverse (115232131), we get a palindrome (246464642).

The spelling of 131232511 in words is "one hundred thirty-one million, two hundred thirty-two thousand, five hundred eleven".