531221213422133 has 8 divisors (see below), whose sum is σ = 572105748827928. Its totient is φ = 490339730179584.

The previous prime is 531221213422073. The next prime is 531221213422139. The reversal of 531221213422133 is 331224312122135.

It can be written as a sum of positive squares in 4 ways, for example, as 62245504134724 + 468975709287409 = 7889582^2 + 21655847^2 .

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 531221213422133 - 2⁴⁶ = 460852469244469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531221213422093 and 531221213422102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531221213422139) 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 7 ways as a sum of consecutive naturals, for example, 762679316 + ... + 763375517.

It is an arithmetic number, because the mean of its divisors is an integer number (71513218603491).

Almost surely, 2^{531221213422133} is an apocalyptic number.

It is an amenable number.

531221213422133 is a deficient number, since it is larger than the sum of its proper divisors (40884535405795).

531221213422133 is a wasteful number, since it uses less digits than its factorization.

531221213422133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526081623.

The product of its digits is 51840, while the sum is 35.

Adding to 531221213422133 its reverse (331224312122135), we get a palindrome (862445525544268).

The spelling of 531221213422133 in words is "five hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirteen million, four hundred twenty-two thousand, one hundred thirty-three".