31103425 has 24 divisors (see below), whose sum is σ = 39926016. Its totient is φ = 24023040.

The previous prime is 31103419. The next prime is 31103441. The reversal of 31103425 is 52430113.

It is not a de Polignac number, because 31103425 - 2³ = 31103417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120897 + ... + 121153.

It is an arithmetic number, because the mean of its divisors is an integer number (1663584).

Almost surely, 2^31103425 is an apocalyptic number.

It is an amenable number.

31103425 is a deficient number, since it is larger than the sum of its proper divisors (8822591).

31103425 is a wasteful number, since it uses less digits than its factorization.

31103425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 412 counting only the distinct ones).

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

The square root of 31103425 is about 5577.0444681749. The cubic root of 31103425 is about 314.4870293735.

Adding to 31103425 its reverse (52430113), we get a palindrome (83533538).

The spelling of 31103425 in words is "thirty-one million, one hundred three thousand, four hundred twenty-five".