213481117 has 2 divisors, whose sum is σ = 213481118. Its totient is φ = 213481116.

The previous prime is 213481067. The next prime is 213481129. The reversal of 213481117 is 711184312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142348761 + 71132356 = 11931^2 + 8434^2 .

It is a cyclic number.

It is not a de Polignac number, because 213481117 - 2²⁷ = 79263389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213481417) 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, 106740558 + 106740559.

It is an arithmetic number, because the mean of its divisors is an integer number (106740559).

Almost surely, 2^213481117 is an apocalyptic number.

It is an amenable number.

213481117 is a deficient number, since it is larger than the sum of its proper divisors (1).

213481117 is an equidigital number, since it uses as much as digits as its factorization.

213481117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 213481117 is about 14610.9930189567. The cubic root of 213481117 is about 597.6585756985.

The spelling of 213481117 in words is "two hundred thirteen million, four hundred eighty-one thousand, one hundred seventeen".