135931515 has 8 divisors (see below), whose sum is σ = 217490448. Its totient is φ = 72496800.

The previous prime is 135931511. The next prime is 135931517. The reversal of 135931515 is 515139531.

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

It is not a de Polignac number, because 135931515 - 2² = 135931511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135931511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4531036 + ... + 4531065.

It is an arithmetic number, because the mean of its divisors is an integer number (27186306).

Almost surely, 2^135931515 is an apocalyptic number.

135931515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135931515 is a deficient number, since it is larger than the sum of its proper divisors (81558933).

135931515 is an equidigital number, since it uses as much as digits as its factorization.

135931515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9062109.

The product of its digits is 10125, while the sum is 33.

The square root of 135931515 is about 11658.9671497950. The cubic root of 135931515 is about 514.1699829422.

The spelling of 135931515 in words is "one hundred thirty-five million, nine hundred thirty-one thousand, five hundred fifteen".