524512404213221 has 2 divisors, whose sum is σ = 524512404213222. Its totient is φ = 524512404213220.

The previous prime is 524512404213167. The next prime is 524512404213229. The reversal of 524512404213221 is 122312404215425.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 456188127990721 + 68324276222500 = 21358561^2 + 8265850^2 .

It is a cyclic number.

It is not a de Polignac number, because 524512404213221 - 2¹⁸ = 524512403951077 is a prime.

It is a super-2 number, since 2×524512404213221² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (524512404213229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262256202106610 + 262256202106611.

It is an arithmetic number, because the mean of its divisors is an integer number (262256202106611).

Almost surely, 2^{524512404213221} is an apocalyptic number.

It is an amenable number.

524512404213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

524512404213221 is an equidigital number, since it uses as much as digits as its factorization.

524512404213221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 524512404213221 its reverse (122312404215425), we get a palindrome (646824808428646).

The spelling of 524512404213221 in words is "five hundred twenty-four trillion, five hundred twelve billion, four hundred four million, two hundred thirteen thousand, two hundred twenty-one".