263436231 has 4 divisors (see below), whose sum is σ = 351248312. Its totient is φ = 175624152.

The previous prime is 263436191. The next prime is 263436253. The reversal of 263436231 is 132634362.

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

It is not a de Polignac number, because 263436231 - 2²⁶ = 196327367 is a prime.

It is a super-2 number, since 2×263436231² = 138797295606970722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263436281) 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, 43906036 + ... + 43906041.

It is an arithmetic number, because the mean of its divisors is an integer number (87812078).

Almost surely, 2^263436231 is an apocalyptic number.

263436231 is a deficient number, since it is larger than the sum of its proper divisors (87812081).

263436231 is an equidigital number, since it uses as much as digits as its factorization.

263436231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87812080.

The product of its digits is 15552, while the sum is 30.

The square root of 263436231 is about 16230.7187456379. The cubic root of 263436231 is about 641.0498970198.

The spelling of 263436231 in words is "two hundred sixty-three million, four hundred thirty-six thousand, two hundred thirty-one".