31020344143 has 4 divisors (see below), whose sum is σ = 31029127848. Its totient is φ = 31011560440.

The previous prime is 31020344141. The next prime is 31020344171. The reversal of 31020344143 is 34144302013.

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 31020344143 - 2¹ = 31020344141 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 (31020344141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4386553 + ... + 4393618.

It is an arithmetic number, because the mean of its divisors is an integer number (7757281962).

Almost surely, 2^31020344143 is an apocalyptic number.

31020344143 is a deficient number, since it is larger than the sum of its proper divisors (8783705).

31020344143 is an equidigital number, since it uses as much as digits as its factorization.

31020344143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8783704.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31020344143 its reverse (34144302013), we get a palindrome (65164646156).

The spelling of 31020344143 in words is "thirty-one billion, twenty million, three hundred forty-four thousand, one hundred forty-three".