135161531 has 2 divisors, whose sum is σ = 135161532. Its totient is φ = 135161530.

The previous prime is 135161527. The next prime is 135161539.

135161531 is nontrivially palindromic in base 10.

135161531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 135161531 - 2² = 135161527 is a prime.

It is a super-2 number, since 2×135161531² = 36537278924527922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135161531.

It is not a weakly prime, because it can be changed into another prime (135161539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67580765 + 67580766.

It is an arithmetic number, because the mean of its divisors is an integer number (67580766).

Almost surely, 2^135161531 is an apocalyptic number.

135161531 is a deficient number, since it is larger than the sum of its proper divisors (1).

135161531 is an equidigital number, since it uses as much as digits as its factorization.

135161531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 26.

The square root of 135161531 is about 11625.8991480229. The cubic root of 135161531 is about 513.1973055082.

The spelling of 135161531 in words is "one hundred thirty-five million, one hundred sixty-one thousand, five hundred thirty-one".