31047304402 has 4 divisors (see below), whose sum is σ = 46570956606. Its totient is φ = 15523652200.

The previous prime is 31047304373. The next prime is 31047304427. The reversal of 31047304402 is 20440374013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20440374013 = 4909 ⋅4163857.

It can be written as a sum of positive squares in only one way, i.e., 22073342041 + 8973962361 = 148571^2 + 94731^2 .

It is a super-2 number, since 2×31047304402² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7761826099 + ... + 7761826102.

Almost surely, 2^31047304402 is an apocalyptic number.

31047304402 is a deficient number, since it is larger than the sum of its proper divisors (15523652204).

31047304402 is a wasteful number, since it uses less digits than its factorization.

31047304402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15523652203.

The product of its (nonzero) digits is 8064, while the sum is 28.

Adding to 31047304402 its reverse (20440374013), we get a palindrome (51487678415).

The spelling of 31047304402 in words is "thirty-one billion, forty-seven million, three hundred four thousand, four hundred two".