261411283 has 4 divisors (see below), whose sum is σ = 298755760. Its totient is φ = 224066808.

The previous prime is 261411281. The next prime is 261411289. The reversal of 261411283 is 382114162.

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

It is not a de Polignac number, because 261411283 - 2¹ = 261411281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261411281) 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, 18672228 + ... + 18672241.

It is an arithmetic number, because the mean of its divisors is an integer number (74688940).

Almost surely, 2^261411283 is an apocalyptic number.

261411283 is a deficient number, since it is larger than the sum of its proper divisors (37344477).

261411283 is an equidigital number, since it uses as much as digits as its factorization.

261411283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37344476.

The product of its digits is 2304, while the sum is 28.

The square root of 261411283 is about 16168.2183001096. The cubic root of 261411283 is about 639.4031569556.

The spelling of 261411283 in words is "two hundred sixty-one million, four hundred eleven thousand, two hundred eighty-three".