213816543046501 has 2 divisors, whose sum is σ = 213816543046502. Its totient is φ = 213816543046500.

The previous prime is 213816543046453. The next prime is 213816543046537. The reversal of 213816543046501 is 105640345618312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208673943693601 + 5142599352900 = 14445551^2 + 2267730^2 .

It is a cyclic number.

It is not a de Polignac number, because 213816543046501 - 2⁴¹ = 211617519790949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213816543086501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106908271523250 + 106908271523251.

It is an arithmetic number, because the mean of its divisors is an integer number (106908271523251).

Almost surely, 2^{213816543046501} is an apocalyptic number.

It is an amenable number.

213816543046501 is a deficient number, since it is larger than the sum of its proper divisors (1).

213816543046501 is an equidigital number, since it uses as much as digits as its factorization.

213816543046501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 213816543046501 in words is "two hundred thirteen trillion, eight hundred sixteen billion, five hundred forty-three million, forty-six thousand, five hundred one".