231826809 has 8 divisors (see below), whose sum is σ = 325371040. Its totient is φ = 146416896.

The previous prime is 231826789. The next prime is 231826811. The reversal of 231826809 is 908628132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231826809 - 2²⁷ = 97609081 is a prime.

It is a super-2 number, since 2×231826809² = 107487338742244962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231826849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2033512 + ... + 2033625.

It is an arithmetic number, because the mean of its divisors is an integer number (40671380).

Almost surely, 2^231826809 is an apocalyptic number.

It is an amenable number.

231826809 is a deficient number, since it is larger than the sum of its proper divisors (93544231).

231826809 is a wasteful number, since it uses less digits than its factorization.

231826809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067159.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 231826809 is about 15225.8598771958. The cubic root of 231826809 is about 614.3104254578.

The spelling of 231826809 in words is "two hundred thirty-one million, eight hundred twenty-six thousand, eight hundred nine".