51641472 has 64 divisors (see below), whose sum is σ = 138116160. Its totient is φ = 17095680.

The previous prime is 51641437. The next prime is 51641479. The reversal of 51641472 is 27414615.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (51641479) 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, 69133 + ... + 69875.

It is an arithmetic number, because the mean of its divisors is an integer number (2158065).

Almost surely, 2^51641472 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 51641472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69058080).

51641472 is an abundant number, since it is smaller than the sum of its proper divisors (86474688).

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

51641472 is a wasteful number, since it uses less digits than its factorization.

51641472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941 (or 929 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 51641472 is about 7186.2001085414. The cubic root of 51641472 is about 372.3913098200.

The spelling of 51641472 in words is "fifty-one million, six hundred forty-one thousand, four hundred seventy-two".