2513221532665 has 16 divisors (see below), whose sum is σ = 3224272341888. Its totient is φ = 1873936048896.

The previous prime is 2513221532623. The next prime is 2513221532669. The reversal of 2513221532665 is 5662351223152.

It is not a de Polignac number, because 2513221532665 - 2⁷ = 2513221532537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2513221532669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143521887 + ... + 143539396.

It is an arithmetic number, because the mean of its divisors is an integer number (201517021368).

Almost surely, 2^{2513221532665} is an apocalyptic number.

It is an amenable number.

2513221532665 is a deficient number, since it is larger than the sum of its proper divisors (711050809223).

2513221532665 is a wasteful number, since it uses less digits than its factorization.

2513221532665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287061408.

The product of its digits is 648000, while the sum is 43.

The spelling of 2513221532665 in words is "two trillion, five hundred thirteen billion, two hundred twenty-one million, five hundred thirty-two thousand, six hundred sixty-five".