213730547 has 2 divisors, whose sum is σ = 213730548. Its totient is φ = 213730546.

The previous prime is 213730541. The next prime is 213730571. The reversal of 213730547 is 745037312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213730547 - 2²⁰ = 212681971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213730541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106865273 + 106865274.

It is an arithmetic number, because the mean of its divisors is an integer number (106865274).

Almost surely, 2^213730547 is an apocalyptic number.

213730547 is a deficient number, since it is larger than the sum of its proper divisors (1).

213730547 is an equidigital number, since it uses as much as digits as its factorization.

213730547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 213730547 is about 14619.5262235135. The cubic root of 213730547 is about 597.8912519483.

Adding to 213730547 its reverse (745037312), we get a palindrome (958767859).

The spelling of 213730547 in words is "two hundred thirteen million, seven hundred thirty thousand, five hundred forty-seven".