7115530531 has 4 divisors (see below), whose sum is σ = 7116078952. Its totient is φ = 7114982112.

The previous prime is 7115530519. The next prime is 7115530547. The reversal of 7115530531 is 1350355117.

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

It is a cyclic number.

It is not a de Polignac number, because 7115530531 - 2¹³ = 7115522339 is a prime.

It is a super-2 number, since 2×7115530531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7115530493 and 7115530502.

It is not an unprimeable number, because it can be changed into a prime (7115530511) 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, 254265 + ... + 280858.

It is an arithmetic number, because the mean of its divisors is an integer number (1779019738).

Almost surely, 2^7115530531 is an apocalyptic number.

7115530531 is a deficient number, since it is larger than the sum of its proper divisors (548421).

7115530531 is a wasteful number, since it uses less digits than its factorization.

7115530531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548420.

The product of its (nonzero) digits is 7875, while the sum is 31.

The square root of 7115530531 is about 84353.6041375826. The cubic root of 7115530531 is about 1923.3977137310.

Adding to 7115530531 its reverse (1350355117), we get a palindrome (8465885648).

The spelling of 7115530531 in words is "seven billion, one hundred fifteen million, five hundred thirty thousand, five hundred thirty-one".