31245103 has 2 divisors, whose sum is σ = 31245104. Its totient is φ = 31245102.

The previous prime is 31245073. The next prime is 31245107. The reversal of 31245103 is 30154213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31245103 is a prime.

It is a super-2 number, since 2×31245103² = 1952512922961218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31245107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15622551 + 15622552.

It is an arithmetic number, because the mean of its divisors is an integer number (15622552).

Almost surely, 2^31245103 is an apocalyptic number.

31245103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31245103 is an equidigital number, since it uses as much as digits as its factorization.

31245103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 31245103 is about 5589.7319255936. The cubic root of 31245103 is about 314.9638087252.

Adding to 31245103 its reverse (30154213), we get a palindrome (61399316).

The spelling of 31245103 in words is "thirty-one million, two hundred forty-five thousand, one hundred three".