31243300432 has 20 divisors (see below), whose sum is σ = 60537369780. Its totient is φ = 15620753408.

The previous prime is 31243300321. The next prime is 31243300447. The reversal of 31243300432 is 23400334213.

It can be written as a sum of positive squares in 2 ways, for example, as 535644736 + 30707655696 = 23144^2 + 175236^2 .

It is a super-2 number, since 2×31243300432² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31243300397 and 31243300406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299838 + ... + 390370.

It is an arithmetic number, because the mean of its divisors is an integer number (3026868489).

Almost surely, 2^31243300432 is an apocalyptic number.

It is an amenable number.

31243300432 is a deficient number, since it is larger than the sum of its proper divisors (29294069348).

31243300432 is a wasteful number, since it uses less digits than its factorization.

31243300432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112110 (or 112104 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 31243300432 its reverse (23400334213), we get a palindrome (54643634645).

The spelling of 31243300432 in words is "thirty-one billion, two hundred forty-three million, three hundred thousand, four hundred thirty-two".