236406431 has 4 divisors (see below), whose sum is σ = 242795832. Its totient is φ = 230017032.

The previous prime is 236406407. The next prime is 236406433. The reversal of 236406431 is 134604632.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-236406431 is a prime.

It is a super-2 number, since 2×236406431² = 111776001236315522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 236406394 and 236406403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (236406433) 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, 3194645 + ... + 3194718.

It is an arithmetic number, because the mean of its divisors is an integer number (60698958).

Almost surely, 2^236406431 is an apocalyptic number.

236406431 is a deficient number, since it is larger than the sum of its proper divisors (6389401).

236406431 is an equidigital number, since it uses as much as digits as its factorization.

236406431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6389400.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 236406431 is about 15375.5140076682. The cubic root of 236406431 is about 618.3292086304.

The spelling of 236406431 in words is "two hundred thirty-six million, four hundred six thousand, four hundred thirty-one".