51105775 has 18 divisors (see below), whose sum is σ = 73719240. Its totient is φ = 35043120.

The previous prime is 51105773. The next prime is 51105781. The reversal of 51105775 is 57750115.

It is not a de Polignac number, because 51105775 - 2¹ = 51105773 is a prime.

It is a super-2 number, since 2×51105775² = 5223600476701250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105773) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19635 + ... + 22084.

Almost surely, 2^51105775 is an apocalyptic number.

51105775 is a deficient number, since it is larger than the sum of its proper divisors (22613465).

51105775 is a wasteful number, since it uses less digits than its factorization.

51105775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41743 (or 41731 counting only the distinct ones).

The product of its (nonzero) digits is 6125, while the sum is 31.

The square root of 51105775 is about 7148.8303239061. The cubic root of 51105775 is about 371.0991784211.

The spelling of 51105775 in words is "fifty-one million, one hundred five thousand, seven hundred seventy-five".