3131503 has 2 divisors, whose sum is σ = 3131504. Its totient is φ = 3131502.

The previous prime is 3131501. The next prime is 3131537. The reversal of 3131503 is 3051313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3131503 - 2¹ = 3131501 is a prime.

It is a super-2 number, since 2×3131503² = 19612622078018, which contains 22 as substring.

Together with 3131501, it forms a pair of twin primes.

3131503 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565751 + 1565752.

It is an arithmetic number, because the mean of its divisors is an integer number (1565752).

Almost surely, 2^3131503 is an apocalyptic number.

3131503 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131503 is an equidigital number, since it uses as much as digits as its factorization.

3131503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 16.

The square root of 3131503 is about 1769.6053232289. The cubic root of 3131503 is about 146.3022293791.

Adding to 3131503 its reverse (3051313), we get a palindrome (6182816).

The spelling of 3131503 in words is "three million, one hundred thirty-one thousand, five hundred three".