1223031331 has 4 divisors (see below), whose sum is σ = 1226889792. Its totient is φ = 1219172872.

The previous prime is 1223031259. The next prime is 1223031343. The reversal of 1223031331 is 1331303221.

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

It is a cyclic number.

It is not a de Polignac number, because 1223031331 - 2¹⁵ = 1222998563 is a prime.

It is a super-2 number, since 2×1223031331² = 2991611273215263122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223031299 and 1223031308.

It is not an unprimeable number, because it can be changed into a prime (1223034331) 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, 1928755 + ... + 1929388.

It is an arithmetic number, because the mean of its divisors is an integer number (306722448).

Almost surely, 2^1223031331 is an apocalyptic number.

1223031331 is a deficient number, since it is larger than the sum of its proper divisors (3858461).

1223031331 is an equidigital number, since it uses as much as digits as its factorization.

1223031331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858460.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1223031331 is about 34971.8648487609. The cubic root of 1223031331 is about 1069.4139892449.

Adding to 1223031331 its reverse (1331303221), we get a palindrome (2554334552).

The spelling of 1223031331 in words is "one billion, two hundred twenty-three million, thirty-one thousand, three hundred thirty-one".