31523103 has 6 divisors (see below), whose sum is σ = 45533384. Its totient is φ = 21015396.

The previous prime is 31523099. The next prime is 31523111. The reversal of 31523103 is 30132513.

It is not a de Polignac number, because 31523103 - 2² = 31523099 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 (31523113) 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 5 ways as a sum of consecutive naturals, for example, 1751275 + ... + 1751292.

Almost surely, 2^31523103 is an apocalyptic number.

31523103 is a deficient number, since it is larger than the sum of its proper divisors (14010281).

31523103 is a wasteful number, since it uses less digits than its factorization.

31523103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502573 (or 3502570 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 31523103 is about 5614.5438817414. The cubic root of 31523103 is about 315.8951709911.

Adding to 31523103 its reverse (30132513), we get a palindrome (61655616).

It can be divided in two parts, 31523 and 103, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 31523103 in words is "thirty-one million, five hundred twenty-three thousand, one hundred three".