135445531 has 8 divisors (see below), whose sum is σ = 146309744. Its totient is φ = 124644960.

The previous prime is 135445501. The next prime is 135445537. The reversal of 135445531 is 135544531.

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

It is a cyclic number.

It is not a de Polignac number, because 135445531 - 2⁹ = 135445019 is a prime.

It is a super-2 number, since 2×135445531² = 36690983735743922, 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 = 135445493 and 135445502.

It is not an unprimeable number, because it can be changed into a prime (135445537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11436 + ... + 20041.

It is an arithmetic number, because the mean of its divisors is an integer number (18288718).

Almost surely, 2^135445531 is an apocalyptic number.

135445531 is a deficient number, since it is larger than the sum of its proper divisors (10864213).

135445531 is a wasteful number, since it uses less digits than its factorization.

135445531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31821.

The product of its digits is 18000, while the sum is 31.

The square root of 135445531 is about 11638.1068477652. The cubic root of 135445531 is about 513.5564956596.

The spelling of 135445531 in words is "one hundred thirty-five million, four hundred forty-five thousand, five hundred thirty-one".