213522077 has 2 divisors, whose sum is σ = 213522078. Its totient is φ = 213522076.

The previous prime is 213522061. The next prime is 213522097. The reversal of 213522077 is 770225312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177928921 + 35593156 = 13339^2 + 5966^2 .

It is a cyclic number.

It is not a de Polignac number, because 213522077 - 2⁴ = 213522061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213522097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106761038 + 106761039.

It is an arithmetic number, because the mean of its divisors is an integer number (106761039).

Almost surely, 2^213522077 is an apocalyptic number.

It is an amenable number.

213522077 is a deficient number, since it is larger than the sum of its proper divisors (1).

213522077 is an equidigital number, since it uses as much as digits as its factorization.

213522077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 213522077 is about 14612.3946360615. The cubic root of 213522077 is about 597.6967969240.

Adding to 213522077 its reverse (770225312), we get a palindrome (983747389).

The spelling of 213522077 in words is "two hundred thirteen million, five hundred twenty-two thousand, seventy-seven".