71243431 has 8 divisors (see below), whose sum is σ = 81525920. Its totient is φ = 60987168.

The previous prime is 71243429. The next prime is 71243453. The reversal of 71243431 is 13434217.

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

It is a cyclic number.

It is not a de Polignac number, because 71243431 - 2¹ = 71243429 is a prime.

It is a super-2 number, since 2×71243431² = 10151252921303522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71243396 and 71243405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71243231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336 + ... + 11941.

It is an arithmetic number, because the mean of its divisors is an integer number (10190740).

Almost surely, 2^71243431 is an apocalyptic number.

71243431 is a deficient number, since it is larger than the sum of its proper divisors (10282489).

71243431 is a wasteful number, since it uses less digits than its factorization.

71243431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13113.

The product of its digits is 2016, while the sum is 25.

The square root of 71243431 is about 8440.5823851201. The cubic root of 71243431 is about 414.5544761533.

Adding to 71243431 its reverse (13434217), we get a palindrome (84677648).

The spelling of 71243431 in words is "seventy-one million, two hundred forty-three thousand, four hundred thirty-one".