31123443422 has 4 divisors (see below), whose sum is σ = 46685165136. Its totient is φ = 15561721710.

The previous prime is 31123443409. The next prime is 31123443443. The reversal of 31123443422 is 22434432113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22434432113 = 111341 ⋅201493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7780860854 + ... + 7780860857.

It is an arithmetic number, because the mean of its divisors is an integer number (11671291284).

Almost surely, 2^31123443422 is an apocalyptic number.

31123443422 is a deficient number, since it is larger than the sum of its proper divisors (15561721714).

31123443422 is a wasteful number, since it uses less digits than its factorization.

31123443422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15561721713.

The product of its digits is 13824, while the sum is 29.

Adding to 31123443422 its reverse (22434432113), we get a palindrome (53557875535).

The spelling of 31123443422 in words is "thirty-one billion, one hundred twenty-three million, four hundred forty-three thousand, four hundred twenty-two".