531065450021 has 8 divisors (see below), whose sum is σ = 559229599200. Its totient is φ = 502922634480.

The previous prime is 531065450009. The next prime is 531065450053. The reversal of 531065450021 is 120054560135.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531065450021 is a prime.

It is a super-4 number, since 4×531065450021⁴ (a number of 48 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 531065450021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531065453021) 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, 5282291 + ... + 5381888.

It is an arithmetic number, because the mean of its divisors is an integer number (69903699900).

Almost surely, 2^531065450021 is an apocalyptic number.

It is an amenable number.

531065450021 is a deficient number, since it is larger than the sum of its proper divisors (28164149179).

531065450021 is a wasteful number, since it uses less digits than its factorization.

531065450021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10666819.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 531065450021 in words is "five hundred thirty-one billion, sixty-five million, four hundred fifty thousand, twenty-one".