135625215 has 16 divisors (see below), whose sum is σ = 236727936. Its totient is φ = 65757600.

The previous prime is 135625213. The next prime is 135625223. The reversal of 135625215 is 512526531.

It is a happy number.

It is not a de Polignac number, because 135625215 - 2¹ = 135625213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135625213) 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 in 15 ways as a sum of consecutive naturals, for example, 410821 + ... + 411150.

It is an arithmetic number, because the mean of its divisors is an integer number (14795496).

Almost surely, 2^135625215 is an apocalyptic number.

135625215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135625215 is a deficient number, since it is larger than the sum of its proper divisors (101102721).

135625215 is a wasteful number, since it uses less digits than its factorization.

135625215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821990.

The product of its digits is 9000, while the sum is 30.

The square root of 135625215 is about 11645.8239296325. The cubic root of 135625215 is about 513.7834924679.

The spelling of 135625215 in words is "one hundred thirty-five million, six hundred twenty-five thousand, two hundred fifteen".