131131511 has 8 divisors (see below), whose sum is σ = 150252960. Its totient is φ = 112107168.

The previous prime is 131131493. The next prime is 131131543. The reversal of 131131511 is 115131131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131131511 - 2⁶ = 131131447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131131511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121511) 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, 21356 + ... + 26801.

It is an arithmetic number, because the mean of its divisors is an integer number (18781620).

Almost surely, 2^131131511 is an apocalyptic number.

131131511 is a deficient number, since it is larger than the sum of its proper divisors (19121449).

131131511 is an equidigital number, since it uses as much as digits as its factorization.

131131511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48553.

The product of its digits is 45, while the sum is 17.

The square root of 131131511 is about 11451.2667858189. The cubic root of 131131511 is about 508.0452031097.

Adding to 131131511 its reverse (115131131), we get a palindrome (246262642).

The spelling of 131131511 in words is "one hundred thirty-one million, one hundred thirty-one thousand, five hundred eleven".