51481080 has 192 divisors, whose sum is σ = 197683200. Its totient is φ = 11370240.

The previous prime is 51481069. The next prime is 51481081. The reversal of 51481080 is 8018415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51481081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77791 + ... + 78449.

It is an arithmetic number, because the mean of its divisors is an integer number (1029600).

Almost surely, 2^51481080 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 51481080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98841600).

51481080 is an abundant number, since it is smaller than the sum of its proper divisors (146202120).

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

51481080 is a wasteful number, since it uses less digits than its factorization.

51481080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 51481080 is about 7175.0317072470. The cubic root of 51481080 is about 372.0053762664.

Adding to 51481080 its reverse (8018415), we get a palindrome (59499495).

The spelling of 51481080 in words is "fifty-one million, four hundred eighty-one thousand, eighty".