213247147 has 2 divisors, whose sum is σ = 213247148. Its totient is φ = 213247146.

The previous prime is 213247129. The next prime is 213247187. The reversal of 213247147 is 741742312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213247147 - 2¹¹ = 213245099 is a prime.

It is not a weakly prime, because it can be changed into another prime (213247187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106623573 + 106623574.

It is an arithmetic number, because the mean of its divisors is an integer number (106623574).

Almost surely, 2^213247147 is an apocalyptic number.

213247147 is a deficient number, since it is larger than the sum of its proper divisors (1).

213247147 is an equidigital number, since it uses as much as digits as its factorization.

213247147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 31.

The square root of 213247147 is about 14602.9841813240. The cubic root of 213247147 is about 597.4401562352.

Adding to 213247147 its reverse (741742312), we get a palindrome (954989459).

The spelling of 213247147 in words is "two hundred thirteen million, two hundred forty-seven thousand, one hundred forty-seven".