530721253 has 4 divisors (see below), whose sum is σ = 530801068. Its totient is φ = 530641440.

The previous prime is 530721239. The next prime is 530721307. The reversal of 530721253 is 352127035.

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 123609924 + 407111329 = 11118^2 + 20177^2 .

It is a cyclic number.

It is not a de Polignac number, because 530721253 - 2⁹ = 530720741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530721203) 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, 28926 + ... + 43567.

It is an arithmetic number, because the mean of its divisors is an integer number (132700267).

Almost surely, 2^530721253 is an apocalyptic number.

It is an amenable number.

530721253 is a deficient number, since it is larger than the sum of its proper divisors (79815).

530721253 is an equidigital number, since it uses as much as digits as its factorization.

530721253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79814.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 530721253 is about 23037.3881549103. The cubic root of 530721253 is about 809.6341654372.

Adding to 530721253 its reverse (352127035), we get a palindrome (882848288).

The spelling of 530721253 in words is "five hundred thirty million, seven hundred twenty-one thousand, two hundred fifty-three".