51125775 has 12 divisors (see below), whose sum is σ = 84528072. Its totient is φ = 27267040.

The previous prime is 51125773. The next prime is 51125779. The reversal of 51125775 is 57752115.

It is not a de Polignac number, because 51125775 - 2¹ = 51125773 is a prime.

It is a super-2 number, since 2×51125775² = 5227689738701250, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51125771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340764 + ... + 340913.

It is an arithmetic number, because the mean of its divisors is an integer number (7044006).

Almost surely, 2^51125775 is an apocalyptic number.

51125775 is a deficient number, since it is larger than the sum of its proper divisors (33402297).

51125775 is a wasteful number, since it uses less digits than its factorization.

51125775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681690 (or 681685 counting only the distinct ones).

The product of its digits is 12250, while the sum is 33.

The square root of 51125775 is about 7150.2290173113. The cubic root of 51125775 is about 371.1475814022.

The spelling of 51125775 in words is "fifty-one million, one hundred twenty-five thousand, seven hundred seventy-five".