524022221 has 2 divisors, whose sum is σ = 524022222. Its totient is φ = 524022220.

The previous prime is 524022211. The next prime is 524022253. The reversal of 524022221 is 122220425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 475719721 + 48302500 = 21811^2 + 6950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-524022221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 524022193 and 524022202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (524022211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262011110 + 262011111.

It is an arithmetic number, because the mean of its divisors is an integer number (262011111).

Almost surely, 2^524022221 is an apocalyptic number.

It is an amenable number.

524022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

524022221 is an equidigital number, since it uses as much as digits as its factorization.

524022221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 524022221 is about 22891.5316438197. The cubic root of 524022221 is about 806.2131937928.

Adding to 524022221 its reverse (122220425), we get a palindrome (646242646).

The spelling of 524022221 in words is "five hundred twenty-four million, twenty-two thousand, two hundred twenty-one".