213242077 has 2 divisors, whose sum is σ = 213242078. Its totient is φ = 213242076.

The previous prime is 213242027. The next prime is 213242083. The reversal of 213242077 is 770242312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205463556 + 7778521 = 14334^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 213242077 - 2¹⁵ = 213209309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213242027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106621038 + 106621039.

It is an arithmetic number, because the mean of its divisors is an integer number (106621039).

Almost surely, 2^213242077 is an apocalyptic number.

It is an amenable number.

213242077 is a deficient number, since it is larger than the sum of its proper divisors (1).

213242077 is an equidigital number, since it uses as much as digits as its factorization.

213242077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 213242077 is about 14602.8105856373. The cubic root of 213242077 is about 597.4354214386.

Adding to 213242077 its reverse (770242312), we get a palindrome (983484389).

The spelling of 213242077 in words is "two hundred thirteen million, two hundred forty-two thousand, seventy-seven".