201085135531 has 8 divisors (see below), whose sum is σ = 230900739584. Its totient is φ = 171541820520.

The previous prime is 201085135523. The next prime is 201085135619. The reversal of 201085135531 is 135531580102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201085135531 - 2³ = 201085135523 is a prime.

It is a super-2 number, since 2×201085135531² (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 (201085135231) 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, 68070675 + ... + 68073628.

It is an arithmetic number, because the mean of its divisors is an integer number (28862592448).

Almost surely, 2^201085135531 is an apocalyptic number.

201085135531 is a deficient number, since it is larger than the sum of its proper divisors (29815604053).

201085135531 is a wasteful number, since it uses less digits than its factorization.

201085135531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136144521.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 201085135531 in words is "two hundred one billion, eighty-five million, one hundred thirty-five thousand, five hundred thirty-one".