135631725 has 24 divisors (see below), whose sum is σ = 224583840. Its totient is φ = 72227520.

The previous prime is 135631723. The next prime is 135631733. The reversal of 135631725 is 527136531.

It is not a de Polignac number, because 135631725 - 2¹ = 135631723 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135631721) 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 23 ways as a sum of consecutive naturals, for example, 82966 + ... + 84584.

It is an arithmetic number, because the mean of its divisors is an integer number (9357660).

Almost surely, 2^135631725 is an apocalyptic number.

135631725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135631725 is a deficient number, since it is larger than the sum of its proper divisors (88952115).

135631725 is a wasteful number, since it uses less digits than its factorization.

135631725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749 (or 2744 counting only the distinct ones).

The product of its digits is 18900, while the sum is 33.

The square root of 135631725 is about 11646.1034256098. The cubic root of 135631725 is about 513.7917128592.

The spelling of 135631725 in words is "one hundred thirty-five million, six hundred thirty-one thousand, seven hundred twenty-five".