213113647 has 2 divisors, whose sum is σ = 213113648. Its totient is φ = 213113646.

The previous prime is 213113629. The next prime is 213113701. The reversal of 213113647 is 746311312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213113647 - 2²³ = 204725039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213113617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556823 + 106556824.

It is an arithmetic number, because the mean of its divisors is an integer number (106556824).

Almost surely, 2^213113647 is an apocalyptic number.

213113647 is a deficient number, since it is larger than the sum of its proper divisors (1).

213113647 is an equidigital number, since it uses as much as digits as its factorization.

213113647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 213113647 is about 14598.4124821845. The cubic root of 213113647 is about 597.3154575595.

Adding to 213113647 its reverse (746311312), we get a palindrome (959424959).

The spelling of 213113647 in words is "two hundred thirteen million, one hundred thirteen thousand, six hundred forty-seven".