2513321261 has 8 divisors (see below), whose sum is σ = 2780422848. Its totient is φ = 2252656000.

The previous prime is 2513321243. The next prime is 2513321267. The reversal of 2513321261 is 1621233152.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2513321261 - 2¹⁰ = 2513320237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2513321261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2513321267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1608260 + ... + 1609821.

It is an arithmetic number, because the mean of its divisors is an integer number (347552856).

Almost surely, 2^2513321261 is an apocalyptic number.

It is an amenable number.

2513321261 is a deficient number, since it is larger than the sum of its proper divisors (267101587).

2513321261 is a wasteful number, since it uses less digits than its factorization.

2513321261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218163.

The product of its digits is 2160, while the sum is 26.

The square root of 2513321261 is about 50133.0356252242. The cubic root of 2513321261 is about 1359.6151702771.

The spelling of 2513321261 in words is "two billion, five hundred thirteen million, three hundred twenty-one thousand, two hundred sixty-one".