236561641 has 2 divisors, whose sum is σ = 236561642. Its totient is φ = 236561640.

The previous prime is 236561639. The next prime is 236561653. The reversal of 236561641 is 146165632.

236561641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139736041 + 96825600 = 11821^2 + 9840^2 .

It is a cyclic number.

It is not a de Polignac number, because 236561641 - 2¹ = 236561639 is a prime.

It is a super-2 number, since 2×236561641² = 111922819985225762, which contains 22 as substring.

Together with 236561639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 236561597 and 236561606.

It is not a weakly prime, because it can be changed into another prime (236564641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118280820 + 118280821.

It is an arithmetic number, because the mean of its divisors is an integer number (118280821).

Almost surely, 2^236561641 is an apocalyptic number.

It is an amenable number.

236561641 is a deficient number, since it is larger than the sum of its proper divisors (1).

236561641 is an equidigital number, since it uses as much as digits as its factorization.

236561641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 236561641 is about 15380.5604904373. The cubic root of 236561641 is about 618.4644980708.

The spelling of 236561641 in words is "two hundred thirty-six million, five hundred sixty-one thousand, six hundred forty-one".