31525131122 has 4 divisors (see below), whose sum is σ = 47287696686. Its totient is φ = 15762565560.

The previous prime is 31525131107. The next prime is 31525131139. The reversal of 31525131122 is 22113152513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22113152513 = 14629 ⋅1511597.

It can be written as a sum of positive squares in only one way, i.e., 27254377921 + 4270753201 = 165089^2 + 65351^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31525131091 and 31525131100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7881282779 + ... + 7881282782.

Almost surely, 2^31525131122 is an apocalyptic number.

31525131122 is a deficient number, since it is larger than the sum of its proper divisors (15762565564).

31525131122 is a wasteful number, since it uses less digits than its factorization.

31525131122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15762565563.

The product of its digits is 1800, while the sum is 26.

Adding to 31525131122 its reverse (22113152513), we get a palindrome (53638283635).

The spelling of 31525131122 in words is "thirty-one billion, five hundred twenty-five million, one hundred thirty-one thousand, one hundred twenty-two".