235312161 has 24 divisors (see below), whose sum is σ = 373885344. Its totient is φ = 131181120.

The previous prime is 235312141. The next prime is 235312171. The reversal of 235312161 is 161213532.

It is not a de Polignac number, because 235312161 - 2¹⁵ = 235279393 is a prime.

It is a super-2 number, since 2×235312161² = 110743626228979842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (235312111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13495 + ... + 25548.

It is an arithmetic number, because the mean of its divisors is an integer number (15578556).

Almost surely, 2^235312161 is an apocalyptic number.

235312161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

235312161 is a deficient number, since it is larger than the sum of its proper divisors (138573183).

235312161 is a wasteful number, since it uses less digits than its factorization.

235312161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39101 (or 39094 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 235312161 is about 15339.8879070220. The cubic root of 235312161 is about 617.3736991383.

Adding to 235312161 its reverse (161213532), we get a palindrome (396525693).

The spelling of 235312161 in words is "two hundred thirty-five million, three hundred twelve thousand, one hundred sixty-one".