213155071 has 2 divisors, whose sum is σ = 213155072. Its totient is φ = 213155070.

The previous prime is 213155057. The next prime is 213155077. The reversal of 213155071 is 170551312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213155071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213155077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106577535 + 106577536.

It is an arithmetic number, because the mean of its divisors is an integer number (106577536).

Almost surely, 2^213155071 is an apocalyptic number.

213155071 is a deficient number, since it is larger than the sum of its proper divisors (1).

213155071 is an equidigital number, since it uses as much as digits as its factorization.

213155071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 213155071 is about 14599.8311976543. The cubic root of 213155071 is about 597.3541561489.

The spelling of 213155071 in words is "two hundred thirteen million, one hundred fifty-five thousand, seventy-one".