1232313331 has 4 divisors (see below), whose sum is σ = 1236036664. Its totient is φ = 1228590000.

The previous prime is 1232313301. The next prime is 1232313361. The reversal of 1232313331 is 1333132321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1333132321 = 19 ⋅70164859.

It is an interprime number because it is at equal distance from previous prime (1232313301) and next prime (1232313361).

It is a cyclic number.

It is not a de Polignac number, because 1232313331 - 2¹⁵ = 1232280563 is a prime.

It is a super-2 number, since 2×1232313331² = 3037192291520631122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232313301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1861170 + ... + 1861831.

It is an arithmetic number, because the mean of its divisors is an integer number (309009166).

Almost surely, 2^1232313331 is an apocalyptic number.

1232313331 is a deficient number, since it is larger than the sum of its proper divisors (3723333).

1232313331 is an equidigital number, since it uses as much as digits as its factorization.

1232313331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723332.

The product of its digits is 972, while the sum is 22.

The square root of 1232313331 is about 35104.3206884851. The cubic root of 1232313331 is about 1072.1125558819.

Adding to 1232313331 its reverse (1333132321), we get a palindrome (2565445652).

The spelling of 1232313331 in words is "one billion, two hundred thirty-two million, three hundred thirteen thousand, three hundred thirty-one".