51440160 has 96 divisors (see below), whose sum is σ = 167311872. Its totient is φ = 13271040.

The previous prime is 51440159. The next prime is 51440161. The reversal of 51440160 is 6104415.

It is an interprime number because it is at equal distance from previous prime (51440159) and next prime (51440161).

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (51440161) 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, 13152 + ... + 16608.

It is an arithmetic number, because the mean of its divisors is an integer number (1742832).

Almost surely, 2^51440160 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 51440160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83655936).

51440160 is an abundant number, since it is smaller than the sum of its proper divisors (115871712).

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

51440160 is a wasteful number, since it uses less digits than its factorization.

51440160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506 (or 3498 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 51440160 is about 7172.1795850355. The cubic root of 51440160 is about 371.9067866810.

Adding to 51440160 its reverse (6104415), we get a palindrome (57544575).

The spelling of 51440160 in words is "fifty-one million, four hundred forty thousand, one hundred sixty".