135853287217 has 4 divisors (see below), whose sum is σ = 136147980276. Its totient is φ = 135558594160.

The previous prime is 135853287211. The next prime is 135853287233. The reversal of 135853287217 is 712782358531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712782358531 = 1063 ⋅670538437.

It can be written as a sum of positive squares in 2 ways, for example, as 100719908496 + 35133378721 = 317364^2 + 187439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135853287217 is a prime.

It is a super-2 number, since 2×135853287217² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135853287211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147345838 + ... + 147346759.

It is an arithmetic number, because the mean of its divisors is an integer number (34036995069).

Almost surely, 2^135853287217 is an apocalyptic number.

It is an amenable number.

135853287217 is a deficient number, since it is larger than the sum of its proper divisors (294693059).

135853287217 is an equidigital number, since it uses as much as digits as its factorization.

135853287217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294693058.

The product of its digits is 2822400, while the sum is 52.

The spelling of 135853287217 in words is "one hundred thirty-five billion, eight hundred fifty-three million, two hundred eighty-seven thousand, two hundred seventeen".