2516321605 has 8 divisors (see below), whose sum is σ = 3450955392. Its totient is φ = 1725477648.

The previous prime is 2516321593. The next prime is 2516321611. The reversal of 2516321605 is 5061236152.

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 2516321605 - 2⁵ = 2516321573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35947417 + ... + 35947486.

It is an arithmetic number, because the mean of its divisors is an integer number (431369424).

Almost surely, 2^2516321605 is an apocalyptic number.

It is an amenable number.

2516321605 is a deficient number, since it is larger than the sum of its proper divisors (934633787).

2516321605 is an equidigital number, since it uses as much as digits as its factorization.

2516321605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71894915.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2516321605 is about 50162.9505212762. The cubic root of 2516321605 is about 1360.1559807039.

Adding to 2516321605 its reverse (5061236152), we get a palindrome (7577557757).

The spelling of 2516321605 in words is "two billion, five hundred sixteen million, three hundred twenty-one thousand, six hundred five".