531445021201 has 4 divisors (see below), whose sum is σ = 531449881600. Its totient is φ = 531440160804.

The previous prime is 531445021199. The next prime is 531445021207. The reversal of 531445021201 is 102120544135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 531445021201 - 2¹ = 531445021199 is a prime.

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 531445021201.

It is not an unprimeable number, because it can be changed into a prime (531445021207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2262321 + ... + 2486158.

It is an arithmetic number, because the mean of its divisors is an integer number (132862470400).

Almost surely, 2^531445021201 is an apocalyptic number.

It is an amenable number.

531445021201 is a deficient number, since it is larger than the sum of its proper divisors (4860399).

531445021201 is a wasteful number, since it uses less digits than its factorization.

531445021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860398.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 531445021201 its reverse (102120544135), we get a palindrome (633565565336).

The spelling of 531445021201 in words is "five hundred thirty-one billion, four hundred forty-five million, twenty-one thousand, two hundred one".