135170231 has 16 divisors (see below), whose sum is σ = 158532864. Its totient is φ = 112860864.

The previous prime is 135170221. The next prime is 135170279. The reversal of 135170231 is 132071531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135170231 is a prime.

It is a super-2 number, since 2×135170231² = 36541982697186722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135170197 and 135170206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135170201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40820 + ... + 44006.

It is an arithmetic number, because the mean of its divisors is an integer number (9908304).

Almost surely, 2^135170231 is an apocalyptic number.

135170231 is a deficient number, since it is larger than the sum of its proper divisors (23362633).

135170231 is an equidigital number, since it uses as much as digits as its factorization.

135170231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 135170231 is about 11626.2733066103. The cubic root of 135170231 is about 513.2083163354.

The spelling of 135170231 in words is "one hundred thirty-five million, one hundred seventy thousand, two hundred thirty-one".