31202143013 has 4 divisors (see below), whose sum is σ = 31641609888. Its totient is φ = 30762676140.

The previous prime is 31202142997. The next prime is 31202143051. The reversal of 31202143013 is 31034120213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31034120213 = 857 ⋅36212509.

It is a cyclic number.

It is not a de Polignac number, because 31202143013 - 2⁴ = 31202142997 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 (31202143513) 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, 219733331 + ... + 219733472.

It is an arithmetic number, because the mean of its divisors is an integer number (7910402472).

Almost surely, 2^31202143013 is an apocalyptic number.

It is an amenable number.

31202143013 is a deficient number, since it is larger than the sum of its proper divisors (439466875).

31202143013 is an equidigital number, since it uses as much as digits as its factorization.

31202143013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439466874.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31202143013 its reverse (31034120213), we get a palindrome (62236263226).

The spelling of 31202143013 in words is "thirty-one billion, two hundred two million, one hundred forty-three thousand, thirteen".