135401531 has 2 divisors, whose sum is σ = 135401532. Its totient is φ = 135401530.

The previous prime is 135401527. The next prime is 135401561. The reversal of 135401531 is 135104531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135401531 - 2² = 135401527 is a prime.

It is a super-2 number, since 2×135401531² = 36667149194287922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 135401497 and 135401506.

It is not a weakly prime, because it can be changed into another prime (135401561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67700765 + 67700766.

It is an arithmetic number, because the mean of its divisors is an integer number (67700766).

Almost surely, 2^135401531 is an apocalyptic number.

135401531 is a deficient number, since it is larger than the sum of its proper divisors (1).

135401531 is an equidigital number, since it uses as much as digits as its factorization.

135401531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 135401531 is about 11636.2163524060. The cubic root of 135401531 is about 513.5008793713.

The spelling of 135401531 in words is "one hundred thirty-five million, four hundred one thousand, five hundred thirty-one".