521152213 has 2 divisors, whose sum is σ = 521152214. Its totient is φ = 521152212.

The previous prime is 521152211. The next prime is 521152231. The reversal of 521152213 is 312251125.

Together with next prime (521152231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 508141764 + 13010449 = 22542^2 + 3607^2 .

It is a cyclic number.

It is not a de Polignac number, because 521152213 - 2¹ = 521152211 is a prime.

It is a super-2 number, since 2×521152213² = 543199258229594738, which contains 22 as substring.

Together with 521152211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521152211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260576106 + 260576107.

It is an arithmetic number, because the mean of its divisors is an integer number (260576107).

Almost surely, 2^521152213 is an apocalyptic number.

It is an amenable number.

521152213 is a deficient number, since it is larger than the sum of its proper divisors (1).

521152213 is an equidigital number, since it uses as much as digits as its factorization.

521152213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 22.

The square root of 521152213 is about 22828.7584638324. The cubic root of 521152213 is about 804.7386536367.

The spelling of 521152213 in words is "five hundred twenty-one million, one hundred fifty-two thousand, two hundred thirteen".