201133531 has 16 divisors (see below), whose sum is σ = 214763040. Its totient is φ = 188052480.

The previous prime is 201133523. The next prime is 201133553. The reversal of 201133531 is 135331102.

It is a cyclic number.

It is not a de Polignac number, because 201133531 - 2³ = 201133523 is a prime.

It is a super-2 number, since 2×201133531² = 80909394585055922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201133499 and 201133508.

It is not an unprimeable number, because it can be changed into a prime (201133501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117675 + ... + 119371.

It is an arithmetic number, because the mean of its divisors is an integer number (13422690).

Almost surely, 2^201133531 is an apocalyptic number.

201133531 is a deficient number, since it is larger than the sum of its proper divisors (13629509).

201133531 is a wasteful number, since it uses less digits than its factorization.

201133531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 201133531 is about 14182.1553721569. The cubic root of 201133531 is about 585.9062885244.

Adding to 201133531 its reverse (135331102), we get a palindrome (336464633).

The spelling of 201133531 in words is "two hundred one million, one hundred thirty-three thousand, five hundred thirty-one".