3561931 has 4 divisors (see below), whose sum is σ = 3676864. Its totient is φ = 3447000.

The previous prime is 3561913. The next prime is 3561947. The reversal of 3561931 is 1391653.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3561931 is a prime.

It is a super-2 number, since 2×3561931² = 25374704897522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3561931.

It is not an unprimeable number, because it can be changed into a prime (3561631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57420 + ... + 57481.

It is an arithmetic number, because the mean of its divisors is an integer number (919216).

Almost surely, 2^3561931 is an apocalyptic number.

3561931 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3561931 is a deficient number, since it is larger than the sum of its proper divisors (114933).

3561931 is a wasteful number, since it uses less digits than its factorization.

3561931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114932.

The product of its digits is 2430, while the sum is 28.

The square root of 3561931 is about 1887.3078710163. The cubic root of 3561931 is about 152.7197369783.

The spelling of 3561931 in words is "three million, five hundred sixty-one thousand, nine hundred thirty-one".