531252344231021 has 8 divisors (see below), whose sum is σ = 608836749459840. Its totient is φ = 454090742301168.

The previous prime is 531252344231009. The next prime is 531252344231027. The reversal of 531252344231021 is 120132443252135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531252344231021 - 2¹⁴ = 531252344214637 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 (531252344231027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105700822046 + ... + 105700827071.

It is an arithmetic number, because the mean of its divisors is an integer number (76104593682480).

Almost surely, 2^{531252344231021} is an apocalyptic number.

It is an amenable number.

531252344231021 is a deficient number, since it is larger than the sum of its proper divisors (77584405228819).

531252344231021 is a wasteful number, since it uses less digits than its factorization.

531252344231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211401649483.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 531252344231021 its reverse (120132443252135), we get a palindrome (651384787483156).

The spelling of 531252344231021 in words is "five hundred thirty-one trillion, two hundred fifty-two billion, three hundred forty-four million, two hundred thirty-one thousand, twenty-one".