2516225665 has 16 divisors (see below), whose sum is σ = 3042121680. Its totient is φ = 1997936640.

The previous prime is 2516225659. The next prime is 2516225671. The reversal of 2516225665 is 5665226152.

2516225665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2516225659) and next prime (2516225671).

It can be written as a sum of positive squares in 8 ways, for example, as 257409936 + 2258815729 = 16044^2 + 47527^2 .

It is not a de Polignac number, because 2516225665 - 2¹¹ = 2516223617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382605 + ... + 389125.

It is an arithmetic number, because the mean of its divisors is an integer number (190132605).

Almost surely, 2^2516225665 is an apocalyptic number.

It is an amenable number.

2516225665 is a deficient number, since it is larger than the sum of its proper divisors (525896015).

2516225665 is a wasteful number, since it uses less digits than its factorization.

2516225665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7092.

The product of its digits is 216000, while the sum is 40.

The square root of 2516225665 is about 50161.9942286987. The cubic root of 2516225665 is about 1360.1386942247.

The spelling of 2516225665 in words is "two billion, five hundred sixteen million, two hundred twenty-five thousand, six hundred sixty-five".