51065757 has 6 divisors (see below), whose sum is σ = 73761662. Its totient is φ = 34043832.

The previous prime is 51065753. The next prime is 51065759. The reversal of 51065757 is 75756015.

It can be written as a sum of positive squares in only one way, i.e., 51065316 + 441 = 7146^2 + 21^2 .

It is not a de Polignac number, because 51065757 - 2² = 51065753 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51065753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2836978 + ... + 2836995.

Almost surely, 2^51065757 is an apocalyptic number.

It is an amenable number.

51065757 is a deficient number, since it is larger than the sum of its proper divisors (22695905).

51065757 is a wasteful number, since it uses less digits than its factorization.

51065757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5673979 (or 5673976 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 51065757 is about 7146.0308563566. The cubic root of 51065757 is about 371.0022909699.

The spelling of 51065757 in words is "fifty-one million, sixty-five thousand, seven hundred fifty-seven".