7145530531 has 4 divisors (see below), whose sum is σ = 7146748152. Its totient is φ = 7144312912.

The previous prime is 7145530517. The next prime is 7145530571. The reversal of 7145530531 is 1350355417.

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 7145530531 - 2⁹ = 7145530019 is a prime.

It is a super-2 number, since 2×7145530531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7145530571) 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, 599965 + ... + 611758.

It is an arithmetic number, because the mean of its divisors is an integer number (1786687038).

Almost surely, 2^7145530531 is an apocalyptic number.

7145530531 is a deficient number, since it is larger than the sum of its proper divisors (1217621).

7145530531 is a wasteful number, since it uses less digits than its factorization.

7145530531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217620.

The product of its (nonzero) digits is 31500, while the sum is 34.

The square root of 7145530531 is about 84531.2399707942. The cubic root of 7145530531 is about 1926.0970218444.

Adding to 7145530531 its reverse (1350355417), we get a palindrome (8495885948).

The spelling of 7145530531 in words is "seven billion, one hundred forty-five million, five hundred thirty thousand, five hundred thirty-one".