52403213 has 2 divisors, whose sum is σ = 52403214. Its totient is φ = 52403212.

The previous prime is 52403173. The next prime is 52403243. The reversal of 52403213 is 31230425.

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., 38167684 + 14235529 = 6178^2 + 3773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52403213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52403243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26201606 + 26201607.

It is an arithmetic number, because the mean of its divisors is an integer number (26201607).

Almost surely, 2^52403213 is an apocalyptic number.

It is an amenable number.

52403213 is a deficient number, since it is larger than the sum of its proper divisors (1).

52403213 is an equidigital number, since it uses as much as digits as its factorization.

52403213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 52403213 is about 7239.0063544661. The cubic root of 52403213 is about 374.2133744820.

Adding to 52403213 its reverse (31230425), we get a palindrome (83633638).

The spelling of 52403213 in words is "fifty-two million, four hundred three thousand, two hundred thirteen".