213488261 has 16 divisors (see below), whose sum is σ = 265326336. Its totient is φ = 167567616.

The previous prime is 213488239. The next prime is 213488287. The reversal of 213488261 is 162884312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213488261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213488221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19841 + ... + 28646.

It is an arithmetic number, because the mean of its divisors is an integer number (16582896).

Almost surely, 2^213488261 is an apocalyptic number.

It is an amenable number.

213488261 is a deficient number, since it is larger than the sum of its proper divisors (51838075).

213488261 is a wasteful number, since it uses less digits than its factorization.

213488261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48548.

The product of its digits is 18432, while the sum is 35.

The square root of 213488261 is about 14611.2374903702. The cubic root of 213488261 is about 597.6652423697.

The spelling of 213488261 in words is "two hundred thirteen million, four hundred eighty-eight thousand, two hundred sixty-one".