31012140143 has 4 divisors (see below), whose sum is σ = 31671972960. Its totient is φ = 30352307328.

The previous prime is 31012140097. The next prime is 31012140151. The reversal of 31012140143 is 34104121013.

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 31012140143 - 2⁸ = 31012139887 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 (31012140343) 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, 329916338 + ... + 329916431.

It is an arithmetic number, because the mean of its divisors is an integer number (7917993240).

Almost surely, 2^31012140143 is an apocalyptic number.

31012140143 is a deficient number, since it is larger than the sum of its proper divisors (659832817).

31012140143 is an equidigital number, since it uses as much as digits as its factorization.

31012140143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659832816.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31012140143 its reverse (34104121013), we get a palindrome (65116261156).

The spelling of 31012140143 in words is "thirty-one billion, twelve million, one hundred forty thousand, one hundred forty-three".