7140231 has 40 divisors (see below), whose sum is σ = 12487200. Its totient is φ = 4064256.

The previous prime is 7140227. The next prime is 7140247. The reversal of 7140231 is 1320417.

It is not a de Polignac number, because 7140231 - 2² = 7140227 is a prime.

It is a super-2 number, since 2×7140231² = 101965797466722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7140251) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27655 + ... + 27911.

It is an arithmetic number, because the mean of its divisors is an integer number (312180).

Almost surely, 2^7140231 is an apocalyptic number.

7140231 is a deficient number, since it is larger than the sum of its proper divisors (5346969).

7140231 is an equidigital number, since it uses as much as digits as its factorization.

7140231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 7140231 is about 2672.1210676165. The cubic root of 7140231 is about 192.5620736455.

Adding to 7140231 its reverse (1320417), we get a palindrome (8460648).

The spelling of 7140231 in words is "seven million, one hundred forty thousand, two hundred thirty-one".