51005055 has 32 divisors (see below), whose sum is σ = 86731200. Its totient is φ = 25546752.

The previous prime is 51005039. The next prime is 51005057. The reversal of 51005055 is 55050015.

It is not a de Polignac number, because 51005055 - 2⁴ = 51005039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14511 + ... + 17679.

It is an arithmetic number, because the mean of its divisors is an integer number (2710350).

Almost surely, 2^51005055 is an apocalyptic number.

51005055 is a deficient number, since it is larger than the sum of its proper divisors (35726145).

51005055 is a wasteful number, since it uses less digits than its factorization.

51005055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243.

The product of its (nonzero) digits is 625, while the sum is 21.

The square root of 51005055 is about 7141.7823405646. The cubic root of 51005055 is about 370.8552288829.

The spelling of 51005055 in words is "fifty-one million, five thousand, fifty-five".