131115511 has 2 divisors, whose sum is σ = 131115512. Its totient is φ = 131115510.

The previous prime is 131115493. The next prime is 131115529. The reversal of 131115511 is 115511131.

It is a balanced prime because it is at equal distance from previous prime (131115493) and next prime (131115529).

It is a cyclic number.

It is not a de Polignac number, because 131115511 - 2²¹ = 129018359 is a prime.

It is a super-2 number, since 2×131115511² = 34382554449582242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131115011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65557755 + 65557756.

It is an arithmetic number, because the mean of its divisors is an integer number (65557756).

Almost surely, 2^131115511 is an apocalyptic number.

131115511 is a deficient number, since it is larger than the sum of its proper divisors (1).

131115511 is an equidigital number, since it uses as much as digits as its factorization.

131115511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75, while the sum is 19.

The square root of 131115511 is about 11450.5681518429. The cubic root of 131115511 is about 508.0245392387.

Adding to 131115511 its reverse (115511131), we get a palindrome (246626642).

The spelling of 131115511 in words is "one hundred thirty-one million, one hundred fifteen thousand, five hundred eleven".