213507138347 has 2 divisors, whose sum is σ = 213507138348. Its totient is φ = 213507138346.

The previous prime is 213507138307. The next prime is 213507138353. The reversal of 213507138347 is 743831705312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213507138347 - 2³⁰ = 212433396523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213507138298 and 213507138307.

It is not a weakly prime, because it can be changed into another prime (213507138307) 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, 106753569173 + 106753569174.

It is an arithmetic number, because the mean of its divisors is an integer number (106753569174).

Almost surely, 2^213507138347 is an apocalyptic number.

213507138347 is a deficient number, since it is larger than the sum of its proper divisors (1).

213507138347 is an equidigital number, since it uses as much as digits as its factorization.

213507138347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 213507138347 in words is "two hundred thirteen billion, five hundred seven million, one hundred thirty-eight thousand, three hundred forty-seven".