213077 has 4 divisors (see below), whose sum is σ = 218316. Its totient is φ = 207840.

The previous prime is 213067. The next prime is 213079. The reversal of 213077 is 770312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45796 + 167281 = 214^2 + 409^2 .

It is a cyclic number.

It is not a de Polignac number, because 213077 - 2¹⁶ = 147541 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2558 + ... + 2639.

It is an arithmetic number, because the mean of its divisors is an integer number (54579).

2²¹³⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

213077 is a deficient number, since it is larger than the sum of its proper divisors (5239).

213077 is an equidigital number, since it uses as much as digits as its factorization.

213077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5238.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 213077 is about 461.6026429734. The cubic root of 213077 is about 59.7281217496.

Adding to 213077 its reverse (770312), we get a palindrome (983389).

The spelling of 213077 in words is "two hundred thirteen thousand, seventy-seven".