235431161 has 4 divisors (see below), whose sum is σ = 269064192. Its totient is φ = 201798132.

The previous prime is 235431103. The next prime is 235431167. The reversal of 235431161 is 161134532.

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-235431161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 235431161.

It is not an unprimeable number, because it can be changed into a prime (235431167) 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, 16816505 + ... + 16816518.

It is an arithmetic number, because the mean of its divisors is an integer number (67266048).

Almost surely, 2^235431161 is an apocalyptic number.

It is an amenable number.

235431161 is a deficient number, since it is larger than the sum of its proper divisors (33633031).

235431161 is an equidigital number, since it uses as much as digits as its factorization.

235431161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33633030.

The product of its digits is 2160, while the sum is 26.

The square root of 235431161 is about 15343.7661934741. The cubic root of 235431161 is about 617.4777525354.

Adding to 235431161 its reverse (161134532), we get a palindrome (396565693).

The spelling of 235431161 in words is "two hundred thirty-five million, four hundred thirty-one thousand, one hundred sixty-one".