213613357 has 2 divisors, whose sum is σ = 213613358. Its totient is φ = 213613356.

The previous prime is 213613349. The next prime is 213613471. The reversal of 213613357 is 753316312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211440681 + 2172676 = 14541^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 213613357 - 2³ = 213613349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213617357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106806678 + 106806679.

It is an arithmetic number, because the mean of its divisors is an integer number (106806679).

Almost surely, 2^213613357 is an apocalyptic number.

It is an amenable number.

213613357 is a deficient number, since it is larger than the sum of its proper divisors (1).

213613357 is an equidigital number, since it uses as much as digits as its factorization.

213613357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 31.

The square root of 213613357 is about 14615.5176781392. The cubic root of 213613357 is about 597.7819559418.

Adding to 213613357 its reverse (753316312), we get a palindrome (966929669).

The spelling of 213613357 in words is "two hundred thirteen million, six hundred thirteen thousand, three hundred fifty-seven".