135031097581 has 8 divisors (see below), whose sum is σ = 136288801440. Its totient is φ = 133773737328.

The previous prime is 135031097557. The next prime is 135031097609. The reversal of 135031097581 is 185790130531.

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 135031097581 - 2²¹ = 135029000429 is a prime.

It is a super-2 number, since 2×135031097581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135031097501) 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, 740550 + ... + 904696.

It is an arithmetic number, because the mean of its divisors is an integer number (17036100180).

Almost surely, 2^135031097581 is an apocalyptic number.

It is an amenable number.

135031097581 is a deficient number, since it is larger than the sum of its proper divisors (1257703859).

135031097581 is a wasteful number, since it uses less digits than its factorization.

135031097581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171803.

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 135031097581 in words is "one hundred thirty-five billion, thirty-one million, ninety-seven thousand, five hundred eighty-one".