7143231 has 4 divisors (see below), whose sum is σ = 9524312. Its totient is φ = 4762152.

The previous prime is 7143223. The next prime is 7143233. The reversal of 7143231 is 1323417.

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

It is not a de Polignac number, because 7143231 - 2³ = 7143223 is a prime.

It is a super-2 number, since 2×7143231² = 102051498238722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7143198 and 7143207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7143233) 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, 1190536 + ... + 1190541.

It is an arithmetic number, because the mean of its divisors is an integer number (2381078).

Almost surely, 2^7143231 is an apocalyptic number.

7143231 is a deficient number, since it is larger than the sum of its proper divisors (2381081).

7143231 is a wasteful number, since it uses less digits than its factorization.

7143231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381080.

The product of its digits is 504, while the sum is 21.

The square root of 7143231 is about 2672.6823604761. The cubic root of 7143231 is about 192.5890384749.

Adding to 7143231 its reverse (1323417), we get a palindrome (8466648).

The spelling of 7143231 in words is "seven million, one hundred forty-three thousand, two hundred thirty-one".