10131531 has 8 divisors (see below), whose sum is σ = 13823040. Its totient is φ = 6597192.

The previous prime is 10131529. The next prime is 10131547. The reversal of 10131531 is 13513101.

10131531 is digitally balanced in base 3, 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 10131531 - 2¹ = 10131529 is a prime.

It is a super-2 number, since 2×10131531² = 205295840807922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10131531.

It is not an unprimeable number, because it can be changed into a prime (10131581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39141 + ... + 39398.

It is an arithmetic number, because the mean of its divisors is an integer number (1727880).

Almost surely, 2^10131531 is an apocalyptic number.

10131531 is a deficient number, since it is larger than the sum of its proper divisors (3691509).

10131531 is an equidigital number, since it uses as much as digits as its factorization.

10131531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78585.

The product of its (nonzero) digits is 45, while the sum is 15.

The square root of 10131531 is about 3183.0065975426. The cubic root of 10131531 is about 216.3839407678.

Adding to 10131531 its reverse (13513101), we get a palindrome (23644632).

The spelling of 10131531 in words is "ten million, one hundred thirty-one thousand, five hundred thirty-one".