2601223261 has 24 divisors (see below), whose sum is σ = 3450376440. Its totient is φ = 1937037312.

The previous prime is 2601223259. The next prime is 2601223279. The reversal of 2601223261 is 1623221062.

It can be written as a sum of positive squares in 4 ways, for example, as 2160900 + 2599062361 = 1470^2 + 50981^2 .

It is not a de Polignac number, because 2601223261 - 2¹ = 2601223259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2601227261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109276 + ... + 130933.

It is an arithmetic number, because the mean of its divisors is an integer number (143765685).

Almost surely, 2^2601223261 is an apocalyptic number.

It is an amenable number.

2601223261 is a deficient number, since it is larger than the sum of its proper divisors (849153179).

2601223261 is a wasteful number, since it uses less digits than its factorization.

2601223261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240253 (or 240246 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2601223261 is about 51002.1887863648. The cubic root of 2601223261 is about 1375.2844830216.

The spelling of 2601223261 in words is "two billion, six hundred one million, two hundred twenty-three thousand, two hundred sixty-one".