1231223432 has 8 divisors (see below), whose sum is σ = 2308543950. Its totient is φ = 615611712.

The previous prime is 1231223417. The next prime is 1231223437. The reversal of 1231223432 is 2343221321.

It can be written as a sum of positive squares in only one way, i.e., 1123188196 + 108035236 = 33514^2 + 10394^2 .

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

It is a super-2 number, since 2×1231223432² = 3031822279011717248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231223398 and 1231223407.

It is not an unprimeable number, because it can be changed into a prime (1231223437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76951457 + ... + 76951472.

Almost surely, 2^1231223432 is an apocalyptic number.

It is an amenable number.

1231223432 is a deficient number, since it is larger than the sum of its proper divisors (1077320518).

1231223432 is a wasteful number, since it uses less digits than its factorization.

1231223432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153902935 (or 153902931 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 1231223432 is about 35088.7935386784. The cubic root of 1231223432 is about 1071.7963919573.

Adding to 1231223432 its reverse (2343221321), we get a palindrome (3574444753).

The spelling of 1231223432 in words is "one billion, two hundred thirty-one million, two hundred twenty-three thousand, four hundred thirty-two".