10031661 has 16 divisors (see below), whose sum is σ = 15073920. Its totient is φ = 6592320.

The previous prime is 10031647. The next prime is 10031669. The reversal of 10031661 is 16613001.

10031661 is a `hidden beast` number, since 1 + 0 + 0 + 3 + 1 + 661 = 666.

It is not a de Polignac number, because 10031661 - 2⁷ = 10031533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700 + ... + 4533.

It is an arithmetic number, because the mean of its divisors is an integer number (942120).

Almost surely, 2^10031661 is an apocalyptic number.

It is an amenable number.

10031661 is a deficient number, since it is larger than the sum of its proper divisors (5042259).

10031661 is an equidigital number, since it uses as much as digits as its factorization.

10031661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5313 (or 5307 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 10031661 is about 3167.2797476699. The cubic root of 10031661 is about 215.6706013194.

Adding to 10031661 its reverse (16613001), we get a palindrome (26644662).

The spelling of 10031661 in words is "ten million, thirty-one thousand, six hundred sixty-one".