213515154031211 has 2 divisors, whose sum is σ = 213515154031212. Its totient is φ = 213515154031210.

The previous prime is 213515154031189. The next prime is 213515154031247. The reversal of 213515154031211 is 112130451515312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213515154031211 is a prime.

It is not a weakly prime, because it can be changed into another prime (213515154031111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106757577015605 + 106757577015606.

It is an arithmetic number, because the mean of its divisors is an integer number (106757577015606).

Almost surely, 2^{213515154031211} is an apocalyptic number.

213515154031211 is a deficient number, since it is larger than the sum of its proper divisors (1).

213515154031211 is an equidigital number, since it uses as much as digits as its factorization.

213515154031211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 213515154031211 in words is "two hundred thirteen trillion, five hundred fifteen billion, one hundred fifty-four million, thirty-one thousand, two hundred eleven".