31542152143 has 4 divisors (see below), whose sum is σ = 31579747920. Its totient is φ = 31504556368.

The previous prime is 31542152077. The next prime is 31542152153. The reversal of 31542152143 is 34125124513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31542152143 - 2¹³ = 31542143951 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 (31542152153) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 18796630 + ... + 18798307.

It is an arithmetic number, because the mean of its divisors is an integer number (7894936980).

Almost surely, 2^31542152143 is an apocalyptic number.

31542152143 is a deficient number, since it is larger than the sum of its proper divisors (37595777).

31542152143 is an equidigital number, since it uses as much as digits as its factorization.

31542152143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37595776.

The product of its digits is 14400, while the sum is 31.

Adding to 31542152143 its reverse (34125124513), we get a palindrome (65667276656).

The spelling of 31542152143 in words is "thirty-one billion, five hundred forty-two million, one hundred fifty-two thousand, one hundred forty-three".