531265481 has 4 divisors (see below), whose sum is σ = 541289412. Its totient is φ = 521241552.

The previous prime is 531265459. The next prime is 531265489. The reversal of 531265481 is 184562135.

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

It can be written as a sum of positive squares in 2 ways, for example, as 131905225 + 399360256 = 11485^2 + 19984^2 .

It is a cyclic number.

It is not a de Polignac number, because 531265481 - 2⁶ = 531265417 is a prime.

It is a super-2 number, since 2×531265481² = 564486022604322722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531265489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5011886 + ... + 5011991.

It is an arithmetic number, because the mean of its divisors is an integer number (135322353).

Almost surely, 2^531265481 is an apocalyptic number.

It is an amenable number.

531265481 is a deficient number, since it is larger than the sum of its proper divisors (10023931).

531265481 is a wasteful number, since it uses less digits than its factorization.

531265481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10023930.

The product of its digits is 28800, while the sum is 35.

The square root of 531265481 is about 23049.1969708274. The cubic root of 531265481 is about 809.9108172908.

The spelling of 531265481 in words is "five hundred thirty-one million, two hundred sixty-five thousand, four hundred eighty-one".