51449160 has 128 divisors (see below), whose sum is σ = 184135680. Its totient is φ = 11244288.

The previous prime is 51449143. The next prime is 51449171. The reversal of 51449160 is 6194415.

51449160 = 175² + 176² + ... + 542².

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17989 + ... + 20651.

It is an arithmetic number, because the mean of its divisors is an integer number (1438560).

Almost surely, 2^51449160 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 51449160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92067840).

51449160 is an abundant number, since it is smaller than the sum of its proper divisors (132686520).

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

51449160 is a wasteful number, since it uses less digits than its factorization.

51449160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707 (or 2703 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 51449160 is about 7172.8069819283. The cubic root of 51449160 is about 371.9284750913.

The spelling of 51449160 in words is "fifty-one million, four hundred forty-nine thousand, one hundred sixty".