1223023131 has 24 divisors (see below), whose sum is σ = 1998569664. Its totient is φ = 741224520.

The previous prime is 1223023127. The next prime is 1223023147. The reversal of 1223023131 is 1313203221.

It is not a de Polignac number, because 1223023131 - 2² = 1223023127 is a prime.

It is a super-2 number, since 2×1223023131² = 2991571157922086322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1223023121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226101 + ... + 231446.

It is an arithmetic number, because the mean of its divisors is an integer number (83273736).

Almost surely, 2^1223023131 is an apocalyptic number.

1223023131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1223023131 is a deficient number, since it is larger than the sum of its proper divisors (775546533).

1223023131 is an equidigital number, since it uses as much as digits as its factorization.

1223023131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457573 (or 457561 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1223023131 is about 34971.7476114649. The cubic root of 1223023131 is about 1069.4115992232.

Adding to 1223023131 its reverse (1313203221), we get a palindrome (2536226352).

The spelling of 1223023131 in words is "one billion, two hundred twenty-three million, twenty-three thousand, one hundred thirty-one".