115131587 has 2 divisors, whose sum is σ = 115131588. Its totient is φ = 115131586.

The previous prime is 115131559. The next prime is 115131589. The reversal of 115131587 is 785131511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115131587 - 2¹² = 115127491 is a prime.

Together with 115131589, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115131589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57565793 + 57565794.

It is an arithmetic number, because the mean of its divisors is an integer number (57565794).

Almost surely, 2^115131587 is an apocalyptic number.

115131587 is a deficient number, since it is larger than the sum of its proper divisors (1).

115131587 is an equidigital number, since it uses as much as digits as its factorization.

115131587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 32.

The square root of 115131587 is about 10729.9388162282. The cubic root of 115131587 is about 486.4798207381.

The spelling of 115131587 in words is "one hundred fifteen million, one hundred thirty-one thousand, five hundred eighty-seven".