51481488 has 60 divisors (see below), whose sum is σ = 140409168. Its totient is φ = 16251840.

The previous prime is 51481477. The next prime is 51481501. The reversal of 51481488 is 88418415.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15843 + ... + 18813.

Almost surely, 2^51481488 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 51481488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70204584).

51481488 is an abundant number, since it is smaller than the sum of its proper divisors (88927680).

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

51481488 is a wasteful number, since it uses less digits than its factorization.

51481488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020 (or 2995 counting only the distinct ones).

The product of its digits is 40960, while the sum is 39.

The square root of 51481488 is about 7175.0601391208. The cubic root of 51481488 is about 372.0063590080.

The spelling of 51481488 in words is "fifty-one million, four hundred eighty-one thousand, four hundred eighty-eight".