51655055 has 4 divisors (see below), whose sum is σ = 61986072. Its totient is φ = 41324040.

The previous prime is 51655013. The next prime is 51655067. The reversal of 51655055 is 55055615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55055615 = 5 ⋅11011123.

It is a de Polignac number, because none of the positive numbers 2^k-51655055 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165501 + ... + 5165510.

It is an arithmetic number, because the mean of its divisors is an integer number (15496518).

Almost surely, 2^51655055 is an apocalyptic number.

51655055 is a deficient number, since it is larger than the sum of its proper divisors (10331017).

51655055 is a wasteful number, since it uses less digits than its factorization.

51655055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10331016.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 51655055 is about 7187.1451216738. The cubic root of 51655055 is about 372.4239563704.

The spelling of 51655055 in words is "fifty-one million, six hundred fifty-five thousand, fifty-five".