213747538247 has 2 divisors, whose sum is σ = 213747538248. Its totient is φ = 213747538246.

The previous prime is 213747538223. The next prime is 213747538253. The reversal of 213747538247 is 742835747312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213747538247 - 2¹² = 213747534151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213747538547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106873769123 + 106873769124.

It is an arithmetic number, because the mean of its divisors is an integer number (106873769124).

Almost surely, 2^213747538247 is an apocalyptic number.

213747538247 is a deficient number, since it is larger than the sum of its proper divisors (1).

213747538247 is an equidigital number, since it uses as much as digits as its factorization.

213747538247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7902720, while the sum is 53.

The spelling of 213747538247 in words is "two hundred thirteen billion, seven hundred forty-seven million, five hundred thirty-eight thousand, two hundred forty-seven".