135211537 has 2 divisors, whose sum is σ = 135211538. Its totient is φ = 135211536.

The previous prime is 135211529. The next prime is 135211567. The reversal of 135211537 is 735112531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90174016 + 45037521 = 9496^2 + 6711^2 .

It is a cyclic number.

It is not a de Polignac number, because 135211537 - 2³ = 135211529 is a prime.

It is not a weakly prime, because it can be changed into another prime (135211507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67605768 + 67605769.

It is an arithmetic number, because the mean of its divisors is an integer number (67605769).

Almost surely, 2^135211537 is an apocalyptic number.

It is an amenable number.

135211537 is a deficient number, since it is larger than the sum of its proper divisors (1).

135211537 is an equidigital number, since it uses as much as digits as its factorization.

135211537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 28.

The square root of 135211537 is about 11628.0495784977. The cubic root of 135211537 is about 513.2605872720.

The spelling of 135211537 in words is "one hundred thirty-five million, two hundred eleven thousand, five hundred thirty-seven".