31545042422 has 4 divisors (see below), whose sum is σ = 47317563636. Its totient is φ = 15772521210.

The previous prime is 31545042413. The next prime is 31545042497. The reversal of 31545042422 is 22424054513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22424054513 = 7 ⋅3203436359.

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, 7886260604 + ... + 7886260607.

It is an arithmetic number, because the mean of its divisors is an integer number (11829390909).

Almost surely, 2^31545042422 is an apocalyptic number.

31545042422 is a deficient number, since it is larger than the sum of its proper divisors (15772521214).

31545042422 is a wasteful number, since it uses less digits than its factorization.

31545042422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15772521213.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 31545042422 its reverse (22424054513), we get a palindrome (53969096935).

The spelling of 31545042422 in words is "thirty-one billion, five hundred forty-five million, forty-two thousand, four hundred twenty-two".