236056421 has 4 divisors (see below), whose sum is σ = 236362572. Its totient is φ = 235750272.

The previous prime is 236056417. The next prime is 236056451. The reversal of 236056421 is 124650632.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17430625 + 218625796 = 4175^2 + 14786^2 .

It is a cyclic number.

It is not a de Polignac number, because 236056421 - 2² = 236056417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (236056451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151916 + ... + 153461.

It is an arithmetic number, because the mean of its divisors is an integer number (59090643).

Almost surely, 2^236056421 is an apocalyptic number.

It is an amenable number.

236056421 is a deficient number, since it is larger than the sum of its proper divisors (306151).

236056421 is an equidigital number, since it uses as much as digits as its factorization.

236056421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306150.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 236056421 is about 15364.1277331321. The cubic root of 236056421 is about 618.0239034822.

The spelling of 236056421 in words is "two hundred thirty-six million, fifty-six thousand, four hundred twenty-one".