51480861 has 16 divisors (see below), whose sum is σ = 73621440. Its totient is φ = 31898880.

The previous prime is 51480851. The next prime is 51480881. The reversal of 51480861 is 16808415.

It is not a de Polignac number, because 51480861 - 2⁶ = 51480797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51480851) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5500 + ... + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (4601340).

Almost surely, 2^51480861 is an apocalyptic number.

It is an amenable number.

51480861 is a deficient number, since it is larger than the sum of its proper divisors (22140579).

51480861 is a wasteful number, since it uses less digits than its factorization.

51480861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17116.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 51480861 is about 7175.0164459742. The cubic root of 51480861 is about 372.0048487633.

The spelling of 51480861 in words is "fifty-one million, four hundred eighty thousand, eight hundred sixty-one".