3561531243 has 8 divisors (see below), whose sum is σ = 4752838656. Its totient is φ = 2372289000.

The previous prime is 3561531223. The next prime is 3561531257. The reversal of 3561531243 is 3421351653.

3561531243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3561531243 - 2¹⁶ = 3561465707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3561531223) 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, 512263 + ... + 519168.

It is an arithmetic number, because the mean of its divisors is an integer number (594104832).

Almost surely, 2^3561531243 is an apocalyptic number.

3561531243 is a deficient number, since it is larger than the sum of its proper divisors (1191307413).

3561531243 is a wasteful number, since it uses less digits than its factorization.

3561531243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032585.

The product of its digits is 32400, while the sum is 33.

The square root of 3561531243 is about 59678.5660266733. The cubic root of 3561531243 is about 1527.1402349798.

Adding to 3561531243 its reverse (3421351653), we get a palindrome (6982882896).

The spelling of 3561531243 in words is "three billion, five hundred sixty-one million, five hundred thirty-one thousand, two hundred forty-three".