1231220432 has 30 divisors (see below), whose sum is σ = 2583109782. Its totient is φ = 568254336.

The previous prime is 1231220381. The next prime is 1231220453. The reversal of 1231220432 is 2340221321.

It can be written as a sum of positive squares in 3 ways, for example, as 12931216 + 1218289216 = 3596^2 + 34904^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224963 + ... + 230370.

Almost surely, 2^1231220432 is an apocalyptic number.

It is an amenable number.

1231220432 is an abundant number, since it is smaller than the sum of its proper divisors (1351889350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231220432 is a wasteful number, since it uses less digits than its factorization.

1231220432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455367 (or 455348 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1231220432 is about 35088.7507899612. The cubic root of 1231220432 is about 1071.7955214433.

Adding to 1231220432 its reverse (2340221321), we get a palindrome (3571441753).

The spelling of 1231220432 in words is "one billion, two hundred thirty-one million, two hundred twenty thousand, four hundred thirty-two".