31160143 has 4 divisors (see below), whose sum is σ = 35611600. Its totient is φ = 26708688.

The previous prime is 31160137. The next prime is 31160161. The reversal of 31160143 is 34106113.

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 31160143 - 2⁵ = 31160111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31160143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31160543) 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, 2225718 + ... + 2225731.

It is an arithmetic number, because the mean of its divisors is an integer number (8902900).

Almost surely, 2^31160143 is an apocalyptic number.

31160143 is a deficient number, since it is larger than the sum of its proper divisors (4451457).

31160143 is an equidigital number, since it uses as much as digits as its factorization.

31160143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451456.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31160143 is about 5582.1271035332. The cubic root of 31160143 is about 314.6780720444.

Adding to 31160143 its reverse (34106113), we get a palindrome (65266256).

The spelling of 31160143 in words is "thirty-one million, one hundred sixty thousand, one hundred forty-three".