135406231 has 12 divisors (see below), whose sum is σ = 140252200. Its totient is φ = 130714560.

The previous prime is 135406223. The next prime is 135406247. The reversal of 135406231 is 132604531.

It is not a de Polignac number, because 135406231 - 2³ = 135406223 is a prime.

It is a super-2 number, since 2×135406231² = 36669694787250722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135406196 and 135406205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135406631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182860 + ... + 183598.

Almost surely, 2^135406231 is an apocalyptic number.

135406231 is a deficient number, since it is larger than the sum of its proper divisors (4845969).

135406231 is an equidigital number, since it uses as much as digits as its factorization.

135406231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 135406231 is about 11636.4183063346. The cubic root of 135406231 is about 513.5068207768.

The spelling of 135406231 in words is "one hundred thirty-five million, four hundred six thousand, two hundred thirty-one".