5225420021 has 2 divisors, whose sum is σ = 5225420022. Its totient is φ = 5225420020.

The previous prime is 5225419987. The next prime is 5225420023. The reversal of 5225420021 is 1200245225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5222230225 + 3189796 = 72265^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 5225420021 - 2¹⁴ = 5225403637 is a prime.

Together with 5225420023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5225420023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2612710010 + 2612710011.

It is an arithmetic number, because the mean of its divisors is an integer number (2612710011).

Almost surely, 2^5225420021 is an apocalyptic number.

It is an amenable number.

5225420021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5225420021 is an equidigital number, since it uses as much as digits as its factorization.

5225420021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 5225420021 is about 72287.0667616276. The cubic root of 5225420021 is about 1735.2966763665.

Adding to 5225420021 its reverse (1200245225), we get a palindrome (6425665246).

The spelling of 5225420021 in words is "five billion, two hundred twenty-five million, four hundred twenty thousand, twenty-one".