162531133 has 4 divisors (see below), whose sum is σ = 169597728. Its totient is φ = 155464540.

The previous prime is 162531077. The next prime is 162531139. The reversal of 162531133 is 331135261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162531133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 162531098 and 162531107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162531139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533263 + ... + 3533308.

It is an arithmetic number, because the mean of its divisors is an integer number (42399432).

Almost surely, 2^162531133 is an apocalyptic number.

It is an amenable number.

162531133 is a deficient number, since it is larger than the sum of its proper divisors (7066595).

162531133 is an equidigital number, since it uses as much as digits as its factorization.

162531133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066594.

The product of its digits is 1620, while the sum is 25.

The square root of 162531133 is about 12748.7698622259. The cubic root of 162531133 is about 545.7312888792.

Adding to 162531133 its reverse (331135261), we get a palindrome (493666394).

The spelling of 162531133 in words is "one hundred sixty-two million, five hundred thirty-one thousand, one hundred thirty-three".