31143214 has 4 divisors (see below), whose sum is σ = 46714824. Its totient is φ = 15571606.

The previous prime is 31143199. The next prime is 31143239. The reversal of 31143214 is 41234113.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 31143191 and 31143200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7785802 + ... + 7785805.

It is an arithmetic number, because the mean of its divisors is an integer number (11678706).

Almost surely, 2^31143214 is an apocalyptic number.

31143214 is a deficient number, since it is larger than the sum of its proper divisors (15571610).

31143214 is a wasteful number, since it uses less digits than its factorization.

31143214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15571609.

The product of its digits is 288, while the sum is 19.

The square root of 31143214 is about 5580.6105400753. The cubic root of 31143214 is about 314.6210745513.

Adding to 31143214 its reverse (41234113), we get a palindrome (72377327).

It can be divided in two parts, 3114 and 3214, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 31143214 in words is "thirty-one million, one hundred forty-three thousand, two hundred fourteen".