531253621 has 8 divisors (see below), whose sum is σ = 564318144. Its totient is φ = 498390720.

The previous prime is 531253579. The next prime is 531253633. The reversal of 531253621 is 126352135.

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

It is a cyclic number.

It is not a de Polignac number, because 531253621 - 2⁷ = 531253493 is a prime.

It is a super-2 number, since 2×531253621² = 564460819651223282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531253621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531251621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44955 + ... + 55528.

It is an arithmetic number, because the mean of its divisors is an integer number (70539768).

Almost surely, 2^531253621 is an apocalyptic number.

It is an amenable number.

531253621 is a deficient number, since it is larger than the sum of its proper divisors (33064523).

531253621 is a wasteful number, since it uses less digits than its factorization.

531253621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100811.

The product of its digits is 5400, while the sum is 28.

The square root of 531253621 is about 23048.9396936171. The cubic root of 531253621 is about 809.9047904147.

The spelling of 531253621 in words is "five hundred thirty-one million, two hundred fifty-three thousand, six hundred twenty-one".