233021161 has 2 divisors, whose sum is σ = 233021162. Its totient is φ = 233021160.

The previous prime is 233021147. The next prime is 233021167. The reversal of 233021161 is 161120332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232745536 + 275625 = 15256^2 + 525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233021161 is a prime.

It is a super-2 number, since 2×233021161² = 108597722947575842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (233021167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116510580 + 116510581.

It is an arithmetic number, because the mean of its divisors is an integer number (116510581).

Almost surely, 2^233021161 is an apocalyptic number.

It is an amenable number.

233021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

233021161 is an equidigital number, since it uses as much as digits as its factorization.

233021161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 233021161 is about 15265.0306583380. The cubic root of 233021161 is about 615.3635772924.

Adding to 233021161 its reverse (161120332), we get a palindrome (394141493).

The spelling of 233021161 in words is "two hundred thirty-three million, twenty-one thousand, one hundred sixty-one".