31542152113 has 4 divisors (see below), whose sum is σ = 31593109360. Its totient is φ = 31491194868.

The previous prime is 31542152077. The next prime is 31542152153. The reversal of 31542152113 is 31125124513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31542152113 - 2¹⁷ = 31542021041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31542152153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25477695 + ... + 25478932.

It is an arithmetic number, because the mean of its divisors is an integer number (7898277340).

Almost surely, 2^31542152113 is an apocalyptic number.

It is an amenable number.

31542152113 is a deficient number, since it is larger than the sum of its proper divisors (50957247).

31542152113 is an equidigital number, since it uses as much as digits as its factorization.

31542152113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50957246.

The product of its digits is 3600, while the sum is 28.

Adding to 31542152113 its reverse (31125124513), we get a palindrome (62667276626).

It can be divided in two parts, 3154215 and 2113, that added together give a triangular number (3156328 = T₂₅₁₂).

The spelling of 31542152113 in words is "thirty-one billion, five hundred forty-two million, one hundred fifty-two thousand, one hundred thirteen".