51887120 has 40 divisors (see below), whose sum is σ = 121611264. Its totient is φ = 20587392.

The previous prime is 51887113. The next prime is 51887123. The reversal of 51887120 is 2178815.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (51887123) 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, 7607 + ... + 12713.

Almost surely, 2^51887120 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 51887120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60805632).

51887120 is an abundant number, since it is smaller than the sum of its proper divisors (69724144).

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

51887120 is a wasteful number, since it uses less digits than its factorization.

51887120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247 (or 5241 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 51887120 is about 7203.2714789879. The cubic root of 51887120 is about 372.9808393390.

The spelling of 51887120 in words is "fifty-one million, eight hundred eighty-seven thousand, one hundred twenty".