51122755 has 4 divisors (see below), whose sum is σ = 61347312. Its totient is φ = 40898200.

The previous prime is 51122693. The next prime is 51122759. The reversal of 51122755 is 55722115.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-51122755 is a prime.

It is a super-2 number, since 2×51122755² = 5227072157580050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51122759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5112271 + ... + 5112280.

It is an arithmetic number, because the mean of its divisors is an integer number (15336828).

Almost surely, 2^51122755 is an apocalyptic number.

51122755 is a deficient number, since it is larger than the sum of its proper divisors (10224557).

51122755 is a wasteful number, since it uses less digits than its factorization.

51122755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10224556.

The product of its digits is 3500, while the sum is 28.

The square root of 51122755 is about 7150.0178321456. The cubic root of 51122755 is about 371.1402733613.

The spelling of 51122755 in words is "fifty-one million, one hundred twenty-two thousand, seven hundred fifty-five".