31430016 has 48 divisors (see below), whose sum is σ = 90446460. Its totient is φ = 10476288.

The previous prime is 31430011. The next prime is 31430017. The reversal of 31430016 is 61003413.

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31430011) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 12490 + ... + 14793.

Almost surely, 2^31430016 is an apocalyptic number.

31430016 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31430016 is an abundant number, since it is smaller than the sum of its proper divisors (59016444).

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

31430016 is a wasteful number, since it uses less digits than its factorization.

31430016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27303 (or 27288 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 31430016 is about 5606.2479431434. The cubic root of 31430016 is about 315.5839206871.

Adding to 31430016 its reverse (61003413), we get a palindrome (92433429).

The spelling of 31430016 in words is "thirty-one million, four hundred thirty thousand, sixteen".