31522140413 has 4 divisors (see below), whose sum is σ = 32290973148. Its totient is φ = 30753307680.

The previous prime is 31522140407. The next prime is 31522140443. The reversal of 31522140413 is 31404122513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31404122513 = 23 ⋅1365396631.

It can be written as a sum of positive squares in 2 ways, for example, as 3880417849 + 27641722564 = 62293^2 + 166258^2 .

It is a cyclic number.

It is not a de Polignac number, because 31522140413 - 2⁸ = 31522140157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31522140443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384416306 + ... + 384416387.

It is an arithmetic number, because the mean of its divisors is an integer number (8072743287).

Almost surely, 2^31522140413 is an apocalyptic number.

It is an amenable number.

31522140413 is a deficient number, since it is larger than the sum of its proper divisors (768832735).

31522140413 is an equidigital number, since it uses as much as digits as its factorization.

31522140413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768832734.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 31522140413 its reverse (31404122513), we get a palindrome (62926262926).

The spelling of 31522140413 in words is "thirty-one billion, five hundred twenty-two million, one hundred forty thousand, four hundred thirteen".