31151133523413 has 6 divisors (see below), whose sum is σ = 44996081756054. Its totient is φ = 20767422348936.

The previous prime is 31151133523409. The next prime is 31151133523429. The reversal of 31151133523413 is 31432533115113.

31151133523413 is a `hidden beast` number, since 3 + 1 + 1 + 5 + 113 + 3 + 523 + 4 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30373071925329 + 778061598084 = 5511177^2 + 882078^2 .

It is not a de Polignac number, because 31151133523413 - 2² = 31151133523409 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 (31151135523413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1730618529070 + ... + 1730618529087.

Almost surely, 2^{31151133523413} is an apocalyptic number.

It is an amenable number.

31151133523413 is a deficient number, since it is larger than the sum of its proper divisors (13844948232641).

31151133523413 is a wasteful number, since it uses less digits than its factorization.

31151133523413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461237058163 (or 3461237058160 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

Adding to 31151133523413 its reverse (31432533115113), we get a palindrome (62583666638526).

The spelling of 31151133523413 in words is "thirty-one trillion, one hundred fifty-one billion, one hundred thirty-three million, five hundred twenty-three thousand, four hundred thirteen".