31430112 has 48 divisors (see below), whose sum is σ = 94292352. Its totient is φ = 8979840.

The previous prime is 31430081. The next prime is 31430117. The reversal of 31430112 is 21103413.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 31430091 and 31430100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31430117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22714 + ... + 24057.

It is an arithmetic number, because the mean of its divisors is an integer number (1964424).

Almost surely, 2^31430112 is an apocalyptic number.

31430112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31430112 is an abundant number, since it is smaller than the sum of its proper divisors (62862240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31430112 is a wasteful number, since it uses less digits than its factorization.

31430112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46791 (or 46783 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31430112 is about 5606.2565050129. The cubic root of 31430112 is about 315.5842419938.

Adding to 31430112 its reverse (21103413), we get a palindrome (52533525).

The spelling of 31430112 in words is "thirty-one million, four hundred thirty thousand, one hundred twelve".