3561550 has 48 divisors (see below), whose sum is σ = 7320960. Its totient is φ = 1283040.

The previous prime is 3561541. The next prime is 3561581. The reversal of 3561550 is 551653.

3561550 = 137² + 138² + ... + 236².

3561550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21769 + ... + 21931.

It is an arithmetic number, because the mean of its divisors is an integer number (152520).

Almost surely, 2^3561550 is an apocalyptic number.

3561550 is an abundant number, since it is smaller than the sum of its proper divisors (3759410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3561550 is a wasteful number, since it uses less digits than its factorization.

3561550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 3561550 is about 1887.2069308902. The cubic root of 3561550 is about 152.7142915898.

The spelling of 3561550 in words is "three million, five hundred sixty-one thousand, five hundred fifty".