31243004402 has 8 divisors (see below), whose sum is σ = 46877781996. Its totient is φ = 15617077072.

The previous prime is 31243004197. The next prime is 31243004423. The reversal of 31243004402 is 20440034213.

It can be written as a sum of positive squares in 2 ways, for example, as 23421547681 + 7821456721 = 153041^2 + 88439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31243004402² (a number of 22 digits) contains 22 as substring.

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, 2203733 + ... + 2217864.

Almost surely, 2^31243004402 is an apocalyptic number.

31243004402 is a deficient number, since it is larger than the sum of its proper divisors (15634777594).

31243004402 is a wasteful number, since it uses less digits than its factorization.

31243004402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425132.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31243004402 its reverse (20440034213), we get a palindrome (51683038615).

The spelling of 31243004402 in words is "thirty-one billion, two hundred forty-three million, four thousand, four hundred two".