231001312 has 12 divisors (see below), whose sum is σ = 454783896. Its totient is φ = 115500640.

The previous prime is 231001307. The next prime is 231001313. The reversal of 231001312 is 213100132.

It is a super-2 number, since 2×231001312² = 106723212291442688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231001292 and 231001301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231001313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3609364 + ... + 3609427.

It is an arithmetic number, because the mean of its divisors is an integer number (37898658).

Almost surely, 2^231001312 is an apocalyptic number.

It is an amenable number.

231001312 is a deficient number, since it is larger than the sum of its proper divisors (223782584).

231001312 is an equidigital number, since it uses as much as digits as its factorization.

231001312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7218801 (or 7218793 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 231001312 is about 15198.7273151406. The cubic root of 231001312 is about 613.5804056032.

Adding to 231001312 its reverse (213100132), we get a palindrome (444101444).

The spelling of 231001312 in words is "two hundred thirty-one million, one thousand, three hundred twelve".