7240031231 has 2 divisors, whose sum is σ = 7240031232. Its totient is φ = 7240031230.

The previous prime is 7240031107. The next prime is 7240031233. The reversal of 7240031231 is 1321300427.

It is a strong prime.

It is an emirp because it is prime and its reverse (1321300427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7240031231 - 2¹⁰ = 7240030207 is a prime.

It is a super-2 number, since 2×7240031231² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 7240031233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7240031197 and 7240031206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7240031233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3620015615 + 3620015616.

It is an arithmetic number, because the mean of its divisors is an integer number (3620015616).

Almost surely, 2^7240031231 is an apocalyptic number.

7240031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

7240031231 is an equidigital number, since it uses as much as digits as its factorization.

7240031231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 7240031231 is about 85088.3730658896. The cubic root of 7240031231 is about 1934.5508358375.

Adding to 7240031231 its reverse (1321300427), we get a palindrome (8561331658).

The spelling of 7240031231 in words is "seven billion, two hundred forty million, thirty-one thousand, two hundred thirty-one".