5561655 has 32 divisors (see below), whose sum is σ = 9980928. Its totient is φ = 2620800.

The previous prime is 5561641. The next prime is 5561657.

5561655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5561655 - 2⁴ = 5561639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

5561655 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5650 + ... + 6560.

It is an arithmetic number, because the mean of its divisors is an integer number (311904).

Almost surely, 2^5561655 is an apocalyptic number.

5561655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5561655 is a deficient number, since it is larger than the sum of its proper divisors (4419273).

5561655 is a wasteful number, since it uses less digits than its factorization.

5561655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967.

The product of its digits is 22500, while the sum is 33.

The square root of 5561655 is about 2358.3161365686. The cubic root of 5561655 is about 177.1745540934.

It can be divided in two parts, 5561 and 655, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 5561655 in words is "five million, five hundred sixty-one thousand, six hundred fifty-five".