2515717945 has 24 divisors (see below), whose sum is σ = 3273867072. Its totient is φ = 1854964800.

The previous prime is 2515717931. The next prime is 2515717951. The reversal of 2515717945 is 5497175152.

It is not a de Polignac number, because 2515717945 - 2⁵ = 2515717913 is a prime.

It is a Duffinian number.

Its product of digits (441000) is a multiple of the sum of its prime divisors (4500).

It is a junction number, because it is equal to n+sod(n) for n = 2515717895 and 2515717904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 683460 + ... + 687130.

It is an arithmetic number, because the mean of its divisors is an integer number (136411128).

Almost surely, 2^2515717945 is an apocalyptic number.

It is an amenable number.

2515717945 is a deficient number, since it is larger than the sum of its proper divisors (758149127).

2515717945 is a wasteful number, since it uses less digits than its factorization.

2515717945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4513 (or 4500 counting only the distinct ones).

The product of its digits is 441000, while the sum is 46.

The square root of 2515717945 is about 50156.9331698022. The cubic root of 2515717945 is about 1360.0472058658.

The spelling of 2515717945 in words is "two billion, five hundred fifteen million, seven hundred seventeen thousand, nine hundred forty-five".