47581312 has 32 divisors (see below), whose sum is σ = 95569920. Its totient is φ = 23595264.

The previous prime is 47581307. The next prime is 47581363. The reversal of 47581312 is 21318574.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-4 number, since 4×47581312⁴ (a number of 32 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14793 + ... + 17719.

It is an arithmetic number, because the mean of its divisors is an integer number (2986560).

Almost surely, 2^47581312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47581312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47784960).

47581312 is an abundant number, since it is smaller than the sum of its proper divisors (47988608).

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

47581312 is a wasteful number, since it uses less digits than its factorization.

47581312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068 (or 3056 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 47581312 is about 6897.9208461681. The cubic root of 47581312 is about 362.3643554323.

Adding to 47581312 its reverse (21318574), we get a palindrome (68899886).

The spelling of 47581312 in words is "forty-seven million, five hundred eighty-one thousand, three hundred twelve".