261064211 has 4 divisors (see below), whose sum is σ = 261106152. Its totient is φ = 261022272.

The previous prime is 261064187. The next prime is 261064213. The reversal of 261064211 is 112460162.

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 261064211 - 2⁶ = 261064147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261064213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9566 + ... + 24771.

It is an arithmetic number, because the mean of its divisors is an integer number (65276538).

Almost surely, 2^261064211 is an apocalyptic number.

261064211 is a deficient number, since it is larger than the sum of its proper divisors (41941).

261064211 is an equidigital number, since it uses as much as digits as its factorization.

261064211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41940.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 261064211 is about 16157.4815797512. The cubic root of 261064211 is about 639.1200561712.

The spelling of 261064211 in words is "two hundred sixty-one million, sixty-four thousand, two hundred eleven".