51480180 has 36 divisors (see below), whose sum is σ = 156157092. Its totient is φ = 13728000.

The previous prime is 51480167. The next prime is 51480193. The reversal of 51480180 is 8108415.

51480180 is a `hidden beast` number, since 5 + 1 + 480 + 180 = 666.

It is an interprime number because it is at equal distance from previous prime (51480167) and next prime (51480193).

It can be written as a sum of positive squares in 2 ways, for example, as 25040016 + 26440164 = 5004^2 + 5142^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142821 + ... + 143180.

It is an arithmetic number, because the mean of its divisors is an integer number (4337697).

Almost surely, 2^51480180 is an apocalyptic number.

It is an amenable number.

51480180 is an abundant number, since it is smaller than the sum of its proper divisors (104676912).

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

51480180 is a wasteful number, since it uses less digits than its factorization.

51480180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286016 (or 286011 counting only the distinct ones).

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

The square root of 51480180 is about 7174.9689894800. The cubic root of 51480180 is about 372.0032084357.

Adding to 51480180 its reverse (8108415), we get a palindrome (59588595).

The spelling of 51480180 in words is "fifty-one million, four hundred eighty thousand, one hundred eighty".