1223131432 has 8 divisors (see below), whose sum is σ = 2293371450. Its totient is φ = 611565712.

The previous prime is 1223131423. The next prime is 1223131439. The reversal of 1223131432 is 2341313221.

It can be written as a sum of positive squares in only one way, i.e., 1201731556 + 21399876 = 34666^2 + 4626^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1223131439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76445707 + ... + 76445722.

Almost surely, 2^1223131432 is an apocalyptic number.

It is an amenable number.

1223131432 is a deficient number, since it is larger than the sum of its proper divisors (1070240018).

1223131432 is a wasteful number, since it uses less digits than its factorization.

1223131432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152891435 (or 152891431 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 1223131432 is about 34973.2959842220. The cubic root of 1223131432 is about 1069.4431644281.

Adding to 1223131432 its reverse (2341313221), we get a palindrome (3564444653).

The spelling of 1223131432 in words is "one billion, two hundred twenty-three million, one hundred thirty-one thousand, four hundred thirty-two".