3561553 has 4 divisors (see below), whose sum is σ = 3565620. Its totient is φ = 3557488.

The previous prime is 3561541. The next prime is 3561581. The reversal of 3561553 is 3551653.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2289169 + 1272384 = 1513^2 + 1128^2 .

It is a cyclic number.

It is not a de Polignac number, because 3561553 - 2⁵ = 3561521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3561053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118 + ... + 2671.

It is an arithmetic number, because the mean of its divisors is an integer number (891405).

Almost surely, 2^3561553 is an apocalyptic number.

It is an amenable number.

3561553 is a deficient number, since it is larger than the sum of its proper divisors (4067).

3561553 is a wasteful number, since it uses less digits than its factorization.

3561553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066.

The product of its digits is 6750, while the sum is 28.

The square root of 3561553 is about 1887.2077257154. The cubic root of 3561553 is about 152.7143344684.

It can be divided in two parts, 3561 and 553, that added together give a palindrome (4114).

The spelling of 3561553 in words is "three million, five hundred sixty-one thousand, five hundred fifty-three".