213430253 has 2 divisors, whose sum is σ = 213430254. Its totient is φ = 213430252.

The previous prime is 213430247. The next prime is 213430279. The reversal of 213430253 is 352034312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168298729 + 45131524 = 12973^2 + 6718^2 .

It is a cyclic number.

It is not a de Polignac number, because 213430253 - 2¹⁶ = 213364717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213430213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106715126 + 106715127.

It is an arithmetic number, because the mean of its divisors is an integer number (106715127).

Almost surely, 2^213430253 is an apocalyptic number.

It is an amenable number.

213430253 is a deficient number, since it is larger than the sum of its proper divisors (1).

213430253 is an equidigital number, since it uses as much as digits as its factorization.

213430253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 213430253 is about 14609.2523080410. The cubic root of 213430253 is about 597.6111058943.

Adding to 213430253 its reverse (352034312), we get a palindrome (565464565).

The spelling of 213430253 in words is "two hundred thirteen million, four hundred thirty thousand, two hundred fifty-three".