51448530 has 96 divisors (see below), whose sum is σ = 148400640. Its totient is φ = 11370240.

The previous prime is 51448483. The next prime is 51448543. The reversal of 51448530 is 3584415.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45006 + ... + 46134.

It is an arithmetic number, because the mean of its divisors is an integer number (1545840).

Almost surely, 2^51448530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51448530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74200320).

51448530 is an abundant number, since it is smaller than the sum of its proper divisors (96952110).

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

51448530 is a wasteful number, since it uses less digits than its factorization.

51448530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 51448530 is about 7172.7630659321. The cubic root of 51448530 is about 371.9269569849.

The spelling of 51448530 in words is "fifty-one million, four hundred forty-eight thousand, five hundred thirty".