213313261 has 16 divisors (see below), whose sum is σ = 248734080. Its totient is φ = 179150400.

The previous prime is 213313253. The next prime is 213313267. The reversal of 213313261 is 162313312.

It is a cyclic number.

It is not a de Polignac number, because 213313261 - 2³ = 213313253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213313267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163311 + ... + 164611.

It is an arithmetic number, because the mean of its divisors is an integer number (15545880).

Almost surely, 2^213313261 is an apocalyptic number.

It is an amenable number.

213313261 is a deficient number, since it is larger than the sum of its proper divisors (35420819).

213313261 is a wasteful number, since it uses less digits than its factorization.

213313261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764.

The product of its digits is 648, while the sum is 22.

The square root of 213313261 is about 14605.2477212816. The cubic root of 213313261 is about 597.5018922345.

Adding to 213313261 its reverse (162313312), we get a palindrome (375626573).

The spelling of 213313261 in words is "two hundred thirteen million, three hundred thirteen thousand, two hundred sixty-one".