51136777 has 2 divisors, whose sum is σ = 51136778. Its totient is φ = 51136776.

The previous prime is 51136747. The next prime is 51136783. The reversal of 51136777 is 77763115.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37711881 + 13424896 = 6141^2 + 3664^2 .

It is a cyclic number.

It is not a de Polignac number, because 51136777 - 2⁷ = 51136649 is a prime.

It is a super-2 number, since 2×51136777² = 5229939923895458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51136747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25568388 + 25568389.

It is an arithmetic number, because the mean of its divisors is an integer number (25568389).

Almost surely, 2^51136777 is an apocalyptic number.

It is an amenable number.

51136777 is a deficient number, since it is larger than the sum of its proper divisors (1).

51136777 is an equidigital number, since it uses as much as digits as its factorization.

51136777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30870, while the sum is 37.

The square root of 51136777 is about 7150.9983219128. The cubic root of 51136777 is about 371.1742025003.

The spelling of 51136777 in words is "fifty-one million, one hundred thirty-six thousand, seven hundred seventy-seven".