31140503 has 2 divisors, whose sum is σ = 31140504. Its totient is φ = 31140502.

The previous prime is 31140497. The next prime is 31140509. The reversal of 31140503 is 30504113.

It is a balanced prime because it is at equal distance from previous prime (31140497) and next prime (31140509).

It is a cyclic number.

It is not a de Polignac number, because 31140503 - 2¹² = 31136407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31140509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15570251 + 15570252.

It is an arithmetic number, because the mean of its divisors is an integer number (15570252).

Almost surely, 2^31140503 is an apocalyptic number.

31140503 is a deficient number, since it is larger than the sum of its proper divisors (1).

31140503 is an equidigital number, since it uses as much as digits as its factorization.

31140503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 31140503 is about 5580.3676402187. The cubic root of 31140503 is about 314.6119450880.

Adding to 31140503 its reverse (30504113), we get a palindrome (61644616).

The spelling of 31140503 in words is "thirty-one million, one hundred forty thousand, five hundred three".