531364226416221 has 32 divisors (see below), whose sum is σ = 789759395186688. Its totient is φ = 315018752106240.

The previous prime is 531364226416213. The next prime is 531364226416291. The reversal of 531364226416221 is 122614622463135.

It is not a de Polignac number, because 531364226416221 - 2³ = 531364226416213 is a prime.

It is a super-2 number, since 2×531364226416221² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531364226416291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88551091 + ... + 94361136.

It is an arithmetic number, because the mean of its divisors is an integer number (24679981099584).

Almost surely, 2^{531364226416221} is an apocalyptic number.

It is an amenable number.

531364226416221 is a deficient number, since it is larger than the sum of its proper divisors (258395168770467).

531364226416221 is a wasteful number, since it uses less digits than its factorization.

531364226416221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182914161.

The product of its digits is 2488320, while the sum is 48.

Adding to 531364226416221 its reverse (122614622463135), we get a palindrome (653978848879356).

The spelling of 531364226416221 in words is "five hundred thirty-one trillion, three hundred sixty-four billion, two hundred twenty-six million, four hundred sixteen thousand, two hundred twenty-one".