2515315561 has 8 divisors (see below), whose sum is σ = 2749912704. Its totient is φ = 2281707120.

The previous prime is 2515315549. The next prime is 2515315567. The reversal of 2515315561 is 1655135152.

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

It is not a de Polignac number, because 2515315561 - 2²⁵ = 2481761129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2515315567) 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, 241846 + ... + 252031.

It is an arithmetic number, because the mean of its divisors is an integer number (343739088).

Almost surely, 2^2515315561 is an apocalyptic number.

It is an amenable number.

2515315561 is a deficient number, since it is larger than the sum of its proper divisors (234597143).

2515315561 is a wasteful number, since it uses less digits than its factorization.

2515315561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494351.

The product of its digits is 22500, while the sum is 34.

The square root of 2515315561 is about 50152.9217593552. The cubic root of 2515315561 is about 1359.9746897323.

The spelling of 2515315561 in words is "two billion, five hundred fifteen million, three hundred fifteen thousand, five hundred sixty-one".