31310243023402 has 12 divisors (see below), whose sum is σ = 54633179153250. Its totient is φ = 13418675581416.

The previous prime is 31310243023349. The next prime is 31310243023427. The reversal of 31310243023402 is 20432034201313.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25726289707881 + 5583953315521 = 5072109^2 + 2363039^2 .

It is a super-2 number, since 2×31310243023402² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159746137777 + ... + 159746137972.

Almost surely, 2^{31310243023402} is an apocalyptic number.

31310243023402 is a deficient number, since it is larger than the sum of its proper divisors (23322936129848).

31310243023402 is a wasteful number, since it uses less digits than its factorization.

31310243023402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319492275765 (or 319492275758 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 31310243023402 its reverse (20432034201313), we get a palindrome (51742277224715).

The spelling of 31310243023402 in words is "thirty-one trillion, three hundred ten billion, two hundred forty-three million, twenty-three thousand, four hundred two".