51280555 has 16 divisors (see below), whose sum is σ = 63957600. Its totient is φ = 39424000.

The previous prime is 51280549. The next prime is 51280561. The reversal of 51280555 is 55508215.

It is an interprime number because it is at equal distance from previous prime (51280549) and next prime (51280561).

It is not a de Polignac number, because 51280555 - 2⁹ = 51280043 is a prime.

It is a super-2 number, since 2×51280555² = 5259390642216050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35691 + ... + 37099.

It is an arithmetic number, because the mean of its divisors is an integer number (3997350).

Almost surely, 2^51280555 is an apocalyptic number.

51280555 is a deficient number, since it is larger than the sum of its proper divisors (12677045).

51280555 is a wasteful number, since it uses less digits than its factorization.

51280555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694.

The product of its (nonzero) digits is 10000, while the sum is 31.

The square root of 51280555 is about 7161.0442674236. The cubic root of 51280555 is about 371.5217458908.

The spelling of 51280555 in words is "fifty-one million, two hundred eighty thousand, five hundred fifty-five".