51480649 has 16 divisors (see below), whose sum is σ = 57620160. Its totient is φ = 45597760.

The previous prime is 51480643. The next prime is 51480659. The reversal of 51480649 is 94608415.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51480649 - 2⁵ = 51480617 is a prime.

It is a super-3 number, since 3×51480649³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51480643) 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, 132147 + ... + 132535.

It is an arithmetic number, because the mean of its divisors is an integer number (3601260).

Almost surely, 2^51480649 is an apocalyptic number.

It is an amenable number.

51480649 is a deficient number, since it is larger than the sum of its proper divisors (6139511).

51480649 is a wasteful number, since it uses less digits than its factorization.

51480649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 51480649 is about 7175.0016724737. The cubic root of 51480649 is about 372.0043381195.

The spelling of 51480649 in words is "fifty-one million, four hundred eighty thousand, six hundred forty-nine".