51486580 has 48 divisors (see below), whose sum is σ = 114670080. Its totient is φ = 19363968.

The previous prime is 51486569. The next prime is 51486583. The reversal of 51486580 is 8568415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51486583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59229 + ... + 60091.

It is an arithmetic number, because the mean of its divisors is an integer number (2388960).

Almost surely, 2^51486580 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 51486580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57335040).

51486580 is an abundant number, since it is smaller than the sum of its proper divisors (63183500).

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

51486580 is a wasteful number, since it uses less digits than its factorization.

51486580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 51486580 is about 7175.4149705784. The cubic root of 51486580 is about 372.0186235714.

The spelling of 51486580 in words is "fifty-one million, four hundred eighty-six thousand, five hundred eighty".