7543531 has 2 divisors, whose sum is σ = 7543532. Its totient is φ = 7543530.

The previous prime is 7543511. The next prime is 7543561. The reversal of 7543531 is 1353457.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7543531 - 2⁵ = 7543499 is a prime.

It is a super-2 number, since 2×7543531² = 113809719895922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7543531.

It is not a weakly prime, because it can be changed into another prime (7543511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3771765 + 3771766.

It is an arithmetic number, because the mean of its divisors is an integer number (3771766).

Almost surely, 2^7543531 is an apocalyptic number.

7543531 is a deficient number, since it is larger than the sum of its proper divisors (1).

7543531 is an equidigital number, since it uses as much as digits as its factorization.

7543531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 28.

The square root of 7543531 is about 2746.5489254699. The cubic root of 7543531 is about 196.1213586197.

Adding to 7543531 its reverse (1353457), we get a palindrome (8896988).

It can be divided in two parts, 75435 and 31, that added together give a triangular number (75466 = T₃₈₈).

The spelling of 7543531 in words is "seven million, five hundred forty-three thousand, five hundred thirty-one".