51089472 has 84 divisors (see below), whose sum is σ = 167371776. Its totient is φ = 14595840.

The previous prime is 51089429. The next prime is 51089473. The reversal of 51089472 is 27498015.

It is a tau number, because it is divible by the number of its divisors (84).

It is a super-2 number, since 2×51089472² = 5220268298477568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51089473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2304 + ... + 10367.

Almost surely, 2^51089472 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 51089472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83685888).

51089472 is an abundant number, since it is smaller than the sum of its proper divisors (116282304).

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

51089472 is a wasteful number, since it uses less digits than its factorization.

51089472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12696 (or 12683 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 51089472 is about 7147.6899764889. The cubic root of 51089472 is about 371.0597133877.

The spelling of 51089472 in words is "fifty-one million, eighty-nine thousand, four hundred seventy-two".