2261010261 has 4 divisors (see below), whose sum is σ = 3014680352. Its totient is φ = 1507340172.

The previous prime is 2261010253. The next prime is 2261010281. The reversal of 2261010261 is 1620101622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2261010261 - 2³ = 2261010253 is a prime.

It is a super-2 number, since 2×2261010261² = 10224334800694576242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261010281) 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, 376835041 + ... + 376835046.

It is an arithmetic number, because the mean of its divisors is an integer number (753670088).

Almost surely, 2^2261010261 is an apocalyptic number.

It is an amenable number.

2261010261 is a deficient number, since it is larger than the sum of its proper divisors (753670091).

2261010261 is an equidigital number, since it uses as much as digits as its factorization.

2261010261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753670090.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2261010261 is about 47550.0816087628. The cubic root of 2261010261 is about 1312.5046309859.

Adding to 2261010261 its reverse (1620101622), we get a palindrome (3881111883).

The spelling of 2261010261 in words is "two billion, two hundred sixty-one million, ten thousand, two hundred sixty-one".