236513641 has 21 divisors (see below), whose sum is σ = 298055451. Its totient is φ = 187131672.

The previous prime is 236513621. The next prime is 236513687. The reversal of 236513641 is 146315632.

The square root of 236513641 is 15379.

It is a perfect power (a square), and thus also a powerful number.

236513641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 202920025 + 33593616 = 14245^2 + 5796^2 .

It is not a de Polignac number, because 236513641 - 2¹¹ = 236511593 is a prime.

It is a Duffinian number.

Its product of digits (12960) is a multiple of the sum of its prime divisors (20).

It is not an unprimeable number, because it can be changed into a prime (236513621) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 18193351 + ... + 18193363.

Almost surely, 2^236513641 is an apocalyptic number.

236513641 is the 15379-th square number.

236513641 is the 7690-th centered octagonal number.

It is an amenable number.

236513641 is a deficient number, since it is larger than the sum of its proper divisors (61541810).

236513641 is an frugal number, since it uses more digits than its factorization.

236513641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 20 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The cubic root of 236513641 is about 618.4226649939.

The spelling of 236513641 in words is "two hundred thirty-six million, five hundred thirteen thousand, six hundred forty-one".