31242442234 has 4 divisors (see below), whose sum is σ = 46863663354. Its totient is φ = 15621221116.

The previous prime is 31242442213. The next prime is 31242442243. The reversal of 31242442234 is 43224424213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43224424213 = 17 ⋅2542613189.

It can be written as a sum of positive squares in only one way, i.e., 29854656225 + 1387786009 = 172785^2 + 37253^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 31242442196 and 31242442205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7810610557 + ... + 7810610560.

Almost surely, 2^31242442234 is an apocalyptic number.

31242442234 is a deficient number, since it is larger than the sum of its proper divisors (15621221120).

31242442234 is a wasteful number, since it uses less digits than its factorization.

31242442234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15621221119.

The product of its digits is 36864, while the sum is 31.

Adding to 31242442234 its reverse (43224424213), we get a palindrome (74466866447).

The spelling of 31242442234 in words is "thirty-one billion, two hundred forty-two million, four hundred forty-two thousand, two hundred thirty-four".