521201207 has 2 divisors, whose sum is σ = 521201208. Its totient is φ = 521201206.

The previous prime is 521201111. The next prime is 521201209. The reversal of 521201207 is 702102125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521201207 - 2¹⁴ = 521184823 is a prime.

Together with 521201209, 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 (521201209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260600603 + 260600604.

It is an arithmetic number, because the mean of its divisors is an integer number (260600604).

Almost surely, 2^521201207 is an apocalyptic number.

521201207 is a deficient number, since it is larger than the sum of its proper divisors (1).

521201207 is an equidigital number, since it uses as much as digits as its factorization.

521201207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 521201207 is about 22829.8315149280. The cubic root of 521201207 is about 804.7638709207.

The spelling of 521201207 in words is "five hundred twenty-one million, two hundred one thousand, two hundred seven".