6315561 has 18 divisors (see below), whose sum is σ = 10612602. Its totient is φ = 3608640.

The previous prime is 6315559. The next prime is 6315571. The reversal of 6315561 is 1655136.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3493161 + 2822400 = 1869^2 + 1680^2 .

It is not a de Polignac number, because 6315561 - 2¹ = 6315559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6315511) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6720 + ... + 7601.

It is an arithmetic number, because the mean of its divisors is an integer number (589589).

Almost surely, 2^6315561 is an apocalyptic number.

It is an amenable number.

6315561 is a deficient number, since it is larger than the sum of its proper divisors (4297041).

6315561 is a wasteful number, since it uses less digits than its factorization.

6315561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14341 (or 14331 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 6315561 is about 2513.0779932187. The cubic root of 6315561 is about 184.8434126658.

The spelling of 6315561 in words is "six million, three hundred fifteen thousand, five hundred sixty-one".