5615561 has 8 divisors (see below), whose sum is σ = 6527040. Its totient is φ = 4731408.

The previous prime is 5615551. The next prime is 5615563. The reversal of 5615561 is 1655165.

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 5615561 - 2⁶ = 5615497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5615563) 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, 6386 + ... + 7211.

It is an arithmetic number, because the mean of its divisors is an integer number (815880).

Almost surely, 2^5615561 is an apocalyptic number.

It is an amenable number.

5615561 is a deficient number, since it is larger than the sum of its proper divisors (911479).

5615561 is a wasteful number, since it uses less digits than its factorization.

5615561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13663.

The product of its digits is 4500, while the sum is 29.

The square root of 5615561 is about 2369.7174937110. The cubic root of 5615561 is about 177.7451324461.

The spelling of 5615561 in words is "five million, six hundred fifteen thousand, five hundred sixty-one".