3561831 has 24 divisors (see below), whose sum is σ = 6333600. Its totient is φ = 1878336.

The previous prime is 3561827. The next prime is 3561841. The reversal of 3561831 is 1381653.

3561831 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 3561831 - 2² = 3561827 is a prime.

It is a super-2 number, since 2×3561831² = 25373280145122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3561795 and 3561804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561841) 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 23 ways as a sum of consecutive naturals, for example, 1356 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (263900).

Almost surely, 2^3561831 is an apocalyptic number.

3561831 is a deficient number, since it is larger than the sum of its proper divisors (2771769).

3561831 is a wasteful number, since it uses less digits than its factorization.

3561831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4375 (or 4372 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 3561831 is about 1887.2813780674. The cubic root of 3561831 is about 152.7183077801.

It can be divided in two parts, 356 and 1831, that added together give a 7-th power (2187 = 3⁷).

The spelling of 3561831 in words is "three million, five hundred sixty-one thousand, eight hundred thirty-one".