31430056 has 16 divisors (see below), whose sum is σ = 67350240. Its totient is φ = 13470000.

The previous prime is 31430053. The next prime is 31430081. The reversal of 31430056 is 65003413.

It is not an unprimeable number, because it can be changed into a prime (31430053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280570 + ... + 280681.

It is an arithmetic number, because the mean of its divisors is an integer number (4209390).

Almost surely, 2^31430056 is an apocalyptic number.

It is an amenable number.

31430056 is an abundant number, since it is smaller than the sum of its proper divisors (35920184).

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

31430056 is a wasteful number, since it uses less digits than its factorization.

31430056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561264 (or 561260 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 31430056 is about 5606.2515105907. The cubic root of 31430056 is about 315.5840545649.

Adding to 31430056 its reverse (65003413), we get a palindrome (96433469).

The spelling of 31430056 in words is "thirty-one million, four hundred thirty thousand, fifty-six".