31234143 has 16 divisors (see below), whose sum is σ = 43186176. Its totient is φ = 20058720.

The previous prime is 31234141. The next prime is 31234183. The reversal of 31234143 is 34143213.

It is not a de Polignac number, because 31234143 - 2¹ = 31234141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23821 + ... + 25097.

It is an arithmetic number, because the mean of its divisors is an integer number (2699136).

Almost surely, 2^31234143 is an apocalyptic number.

31234143 is a deficient number, since it is larger than the sum of its proper divisors (11952033).

31234143 is a wasteful number, since it uses less digits than its factorization.

31234143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574.

The product of its digits is 864, while the sum is 21.

The square root of 31234143 is about 5588.7514705880. The cubic root of 31234143 is about 314.9269772784.

Adding to 31234143 its reverse (34143213), we get a palindrome (65377356).

The spelling of 31234143 in words is "thirty-one million, two hundred thirty-four thousand, one hundred forty-three".