213515154031189 has 2 divisors, whose sum is σ = 213515154031190. Its totient is φ = 213515154031188.

The previous prime is 213515154031163. The next prime is 213515154031211. The reversal of 213515154031189 is 981130451515312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122611705482289 + 90903448548900 = 11073017^2 + 9534330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213515154031189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213515154731189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106757577015594 + 106757577015595.

It is an arithmetic number, because the mean of its divisors is an integer number (106757577015595).

Almost surely, 2^{213515154031189} is an apocalyptic number.

It is an amenable number.

213515154031189 is a deficient number, since it is larger than the sum of its proper divisors (1).

213515154031189 is an equidigital number, since it uses as much as digits as its factorization.

213515154031189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 49.

The spelling of 213515154031189 in words is "two hundred thirteen trillion, five hundred fifteen billion, one hundred fifty-four million, thirty-one thousand, one hundred eighty-nine".