31143441 has 8 divisors (see below), whose sum is σ = 47456704. Its totient is φ = 17796240.

The previous prime is 31143433. The next prime is 31143443. The reversal of 31143441 is 14434113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31143441 - 2³ = 31143433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1483021 = 31143441 / (3 + 1 + 1 + 4 + 3 + 4 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31143443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741490 + ... + 741531.

It is an arithmetic number, because the mean of its divisors is an integer number (5932088).

Almost surely, 2^31143441 is an apocalyptic number.

It is an amenable number.

31143441 is a deficient number, since it is larger than the sum of its proper divisors (16313263).

31143441 is a wasteful number, since it uses less digits than its factorization.

31143441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483031.

The product of its digits is 576, while the sum is 21.

The square root of 31143441 is about 5580.6308783147. The cubic root of 31143441 is about 314.6218389641.

Adding to 31143441 its reverse (14434113), we get a palindrome (45577554).

It can be divided in two parts, 3114 and 3441, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 31143441 in words is "thirty-one million, one hundred forty-three thousand, four hundred forty-one".