213423247 has 2 divisors, whose sum is σ = 213423248. Its totient is φ = 213423246.

The previous prime is 213423229. The next prime is 213423263. The reversal of 213423247 is 742324312.

213423247 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 is a cyclic number.

It is not a de Polignac number, because 213423247 - 2¹⁵ = 213390479 is a prime.

It is a super-3 number, since 3×213423247³ (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 (213423277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106711623 + 106711624.

It is an arithmetic number, because the mean of its divisors is an integer number (106711624).

Almost surely, 2^213423247 is an apocalyptic number.

213423247 is a deficient number, since it is larger than the sum of its proper divisors (1).

213423247 is an equidigital number, since it uses as much as digits as its factorization.

213423247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 28.

The square root of 213423247 is about 14609.0125265194. The cubic root of 213423247 is about 597.6045668195.

Adding to 213423247 its reverse (742324312), we get a palindrome (955747559).

The spelling of 213423247 in words is "two hundred thirteen million, four hundred twenty-three thousand, two hundred forty-seven".