531320265 has 48 divisors (see below), whose sum is σ = 1054475136. Its totient is φ = 242438400.

The previous prime is 531320239. The next prime is 531320269. The reversal of 531320265 is 562023135.

It is not a de Polignac number, because 531320265 - 2⁷ = 531320137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531320269) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 216445 + ... + 218885.

It is an arithmetic number, because the mean of its divisors is an integer number (21968232).

Almost surely, 2^531320265 is an apocalyptic number.

It is an amenable number.

531320265 is a deficient number, since it is larger than the sum of its proper divisors (523154871).

531320265 is a wasteful number, since it uses less digits than its factorization.

531320265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150 (or 3147 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 531320265 is about 23050.3853546964. The cubic root of 531320265 is about 809.9386556195.

The spelling of 531320265 in words is "five hundred thirty-one million, three hundred twenty thousand, two hundred sixty-five".