10131685 has 8 divisors (see below), whose sum is σ = 12187800. Its totient is φ = 8085504.

The previous prime is 10131623. The next prime is 10131689. The reversal of 10131685 is 58613101.

10131685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 196 + 10131489 = 14^2 + 3183^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 10131685 - 2⁷ = 10131557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10131689) 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, 12 + ... + 4501.

It is an arithmetic number, because the mean of its divisors is an integer number (1523475).

Almost surely, 2^10131685 is an apocalyptic number.

It is an amenable number.

10131685 is a deficient number, since it is larger than the sum of its proper divisors (2056115).

10131685 is an equidigital number, since it uses as much as digits as its factorization.

10131685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 10131685 is about 3183.0307884153. The cubic root of 10131685 is about 216.3850371128.

Adding to 10131685 its reverse (58613101), we get a palindrome (68744786).

It can be divided in two parts, 10131 and 685, that added together give a square (10816 = 104²).

The spelling of 10131685 in words is "ten million, one hundred thirty-one thousand, six hundred eighty-five".