31243430432 has 12 divisors (see below), whose sum is σ = 61510503726. Its totient is φ = 15621715200.

The previous prime is 31243430417. The next prime is 31243430447. The reversal of 31243430432 is 23403434213.

It is an interprime number because it is at equal distance from previous prime (31243430417) and next prime (31243430447).

It can be written as a sum of positive squares in only one way, i.e., 27424684816 + 3818745616 = 165604^2 + 61796^2 .

It is a super-4 number, since 4×31243430432⁴ (a number of 43 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31243430395 and 31243430404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488178569 + ... + 488178632.

Almost surely, 2^31243430432 is an apocalyptic number.

31243430432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31243430432 is a deficient number, since it is larger than the sum of its proper divisors (30267073294).

31243430432 is an equidigital number, since it uses as much as digits as its factorization.

31243430432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976357211 (or 976357203 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 31243430432 its reverse (23403434213), we get a palindrome (54646864645).

The spelling of 31243430432 in words is "thirty-one billion, two hundred forty-three million, four hundred thirty thousand, four hundred thirty-two".