231312801 has 4 divisors (see below), whose sum is σ = 308417072. Its totient is φ = 154208532.

The previous prime is 231312791. The next prime is 231312833. The reversal of 231312801 is 108213132.

231312801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 231312801 - 2¹⁰ = 231311777 is a prime.

It is a super-2 number, since 2×231312801² = 107011223812931202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231312841) 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, 38552131 + ... + 38552136.

It is an arithmetic number, because the mean of its divisors is an integer number (77104268).

Almost surely, 2^231312801 is an apocalyptic number.

It is an amenable number.

231312801 is a deficient number, since it is larger than the sum of its proper divisors (77104271).

231312801 is an equidigital number, since it uses as much as digits as its factorization.

231312801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77104270.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 231312801 is about 15208.9710697338. The cubic root of 231312801 is about 613.8560717225.

Adding to 231312801 its reverse (108213132), we get a palindrome (339525933).

The spelling of 231312801 in words is "two hundred thirty-one million, three hundred twelve thousand, eight hundred one".