260211731 has 4 divisors (see below), whose sum is σ = 280228032. Its totient is φ = 240195432.

The previous prime is 260211661. The next prime is 260211769. The reversal of 260211731 is 137112062.

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

It is a cyclic number.

It is not a de Polignac number, because 260211731 - 2¹⁸ = 259949587 is a prime.

It is a super-2 number, since 2×260211731² = 135420289900032722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 260211697 and 260211706.

It is not an unprimeable number, because it can be changed into a prime (260211431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10008131 + ... + 10008156.

It is an arithmetic number, because the mean of its divisors is an integer number (70057008).

Almost surely, 2^260211731 is an apocalyptic number.

260211731 is a deficient number, since it is larger than the sum of its proper divisors (20016301).

260211731 is a wasteful number, since it uses less digits than its factorization.

260211731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20016300.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 260211731 is about 16131.0796600848. The cubic root of 260211731 is about 638.4236359569.

Adding to 260211731 its reverse (137112062), we get a palindrome (397323793).

The spelling of 260211731 in words is "two hundred sixty million, two hundred eleven thousand, seven hundred thirty-one".