31053216 has 24 divisors (see below), whose sum is σ = 81514944. Its totient is φ = 10351040.

The previous prime is 31053179. The next prime is 31053221. The reversal of 31053216 is 61235013.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 31053192 and 31053201.

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 3 ways as a sum of consecutive naturals, for example, 161640 + ... + 161831.

It is an arithmetic number, because the mean of its divisors is an integer number (3396456).

Almost surely, 2^31053216 is an apocalyptic number.

It is an amenable number.

31053216 is an abundant number, since it is smaller than the sum of its proper divisors (50461728).

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

31053216 is a wasteful number, since it uses less digits than its factorization.

31053216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323484 (or 323476 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 31053216 is about 5572.5412515297. The cubic root of 31053216 is about 314.3177170088.

Adding to 31053216 its reverse (61235013), we get a palindrome (92288229).

The spelling of 31053216 in words is "thirty-one million, fifty-three thousand, two hundred sixteen".