10131503 has 4 divisors (see below), whose sum is σ = 10664760. Its totient is φ = 9598248.

The previous prime is 10131491. The next prime is 10131529. The reversal of 10131503 is 30513101.

10131503 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30513101 = 43 ⋅709607.

It is a cyclic number.

It is not a de Polignac number, because 10131503 - 2¹⁰ = 10130479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10131403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266600 + ... + 266637.

It is an arithmetic number, because the mean of its divisors is an integer number (2666190).

Almost surely, 2^10131503 is an apocalyptic number.

10131503 is a deficient number, since it is larger than the sum of its proper divisors (533257).

10131503 is an equidigital number, since it uses as much as digits as its factorization.

10131503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533256.

The product of its (nonzero) digits is 45, while the sum is 14.

The square root of 10131503 is about 3183.0021991824. The cubic root of 10131503 is about 216.3837414312.

Subtracting from 10131503 its sum of digits (14), we obtain a square (10131489 = 3183²).

Adding to 10131503 its reverse (30513101), we get a palindrome (40644604).

The spelling of 10131503 in words is "ten million, one hundred thirty-one thousand, five hundred three".