245503213 has 2 divisors, whose sum is σ = 245503214. Its totient is φ = 245503212.

The previous prime is 245503157. The next prime is 245503243. The reversal of 245503213 is 312305542.

245503213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140707044 + 104796169 = 11862^2 + 10237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245503213 is a prime.

It is a super-3 number, since 3×245503213³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245503243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122751606 + 122751607.

It is an arithmetic number, because the mean of its divisors is an integer number (122751607).

Almost surely, 2^245503213 is an apocalyptic number.

It is an amenable number.

245503213 is a deficient number, since it is larger than the sum of its proper divisors (1).

245503213 is an equidigital number, since it uses as much as digits as its factorization.

245503213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 245503213 is about 15668.5421466070. The cubic root of 245503213 is about 626.1605852929.

Adding to 245503213 its reverse (312305542), we get a palindrome (557808755).

The spelling of 245503213 in words is "two hundred forty-five million, five hundred three thousand, two hundred thirteen".