7531427531 has 2 divisors, whose sum is σ = 7531427532. Its totient is φ = 7531427530.

The previous prime is 7531427521. The next prime is 7531427569. The reversal of 7531427531 is 1357241357.

It is a happy number.

It is an a-pointer prime, because the next prime (7531427569) can be obtained adding 7531427531 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7531427531 - 2¹⁸ = 7531165387 is a prime.

It is a super-2 number, since 2×7531427531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7531427521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3765713765 + 3765713766.

It is an arithmetic number, because the mean of its divisors is an integer number (3765713766).

Almost surely, 2^7531427531 is an apocalyptic number.

7531427531 is a deficient number, since it is larger than the sum of its proper divisors (1).

7531427531 is an equidigital number, since it uses as much as digits as its factorization.

7531427531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 38.

The square root of 7531427531 is about 86783.7976295115. The cubic root of 7531427531 is about 1960.1641132713.

Adding to 7531427531 its reverse (1357241357), we get a palindrome (8888668888).

The spelling of 7531427531 in words is "seven billion, five hundred thirty-one million, four hundred twenty-seven thousand, five hundred thirty-one".