253603213 has 2 divisors, whose sum is σ = 253603214. Its totient is φ = 253603212.

The previous prime is 253603171. The next prime is 253603249. The reversal of 253603213 is 312306352.

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., 228070404 + 25532809 = 15102^2 + 5053^2 .

It is a cyclic number.

It is not a de Polignac number, because 253603213 - 2²¹ = 251506061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253603253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126801606 + 126801607.

It is an arithmetic number, because the mean of its divisors is an integer number (126801607).

Almost surely, 2^253603213 is an apocalyptic number.

It is an amenable number.

253603213 is a deficient number, since it is larger than the sum of its proper divisors (1).

253603213 is an equidigital number, since it uses as much as digits as its factorization.

253603213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 253603213 is about 15924.9242698356. The cubic root of 253603213 is about 632.9726093265.

Adding to 253603213 its reverse (312306352), we get a palindrome (565909565).

The spelling of 253603213 in words is "two hundred fifty-three million, six hundred three thousand, two hundred thirteen".