31100243432 has 16 divisors (see below), whose sum is σ = 58608964260. Its totient is φ = 15471186304.

The previous prime is 31100243417. The next prime is 31100243521. The reversal of 31100243432 is 23434200113.

It can be written as a sum of positive squares in 2 ways, for example, as 25755756196 + 5344487236 = 160486^2 + 73106^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31100243398 and 31100243407.

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, 9865253 + ... + 9868404.

Almost surely, 2^31100243432 is an apocalyptic number.

It is an amenable number.

31100243432 is a deficient number, since it is larger than the sum of its proper divisors (27508720828).

31100243432 is a wasteful number, since it uses less digits than its factorization.

31100243432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19733860 (or 19733856 counting only the distinct ones).

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

Adding to 31100243432 its reverse (23434200113), we get a palindrome (54534443545).

The spelling of 31100243432 in words is "thirty-one billion, one hundred million, two hundred forty-three thousand, four hundred thirty-two".