530211861 has 24 divisors (see below), whose sum is σ = 818377560. Its totient is φ = 329619456.

The previous prime is 530211833. The next prime is 530211863. The reversal of 530211861 is 168112035.

It can be written as a sum of positive squares in 4 ways, for example, as 255680100 + 274531761 = 15990^2 + 16569^2 .

It is not a de Polignac number, because 530211861 - 2⁷ = 530211733 is a prime.

It is a super-2 number, since 2×530211861² = 562249235090166642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530211863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 781 + ... + 32573.

It is an arithmetic number, because the mean of its divisors is an integer number (34099065).

Almost surely, 2^530211861 is an apocalyptic number.

530211861 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

530211861 is a deficient number, since it is larger than the sum of its proper divisors (288165699).

530211861 is a wasteful number, since it uses less digits than its factorization.

530211861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31925 (or 31922 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 530211861 is about 23026.3297335898. The cubic root of 530211861 is about 809.3750506423.

Adding to 530211861 its reverse (168112035), we get a palindrome (698323896).

The spelling of 530211861 in words is "five hundred thirty million, two hundred eleven thousand, eight hundred sixty-one".