51777713 has 6 divisors (see below), whose sum is σ = 56067174. Its totient is φ = 47794656.

The previous prime is 51777703. The next prime is 51777721. The reversal of 51777713 is 31777715.

It can be written as a sum of positive squares in 3 ways, for example, as 3655744 + 48121969 = 1912^2 + 6937^2 .

It is not a de Polignac number, because 51777713 - 2⁴ = 51777697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51777703) 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, 153020 + ... + 153357.

It is an arithmetic number, because the mean of its divisors is an integer number (9344529).

Almost surely, 2^51777713 is an apocalyptic number.

It is an amenable number.

51777713 is a deficient number, since it is larger than the sum of its proper divisors (4289461).

51777713 is a wasteful number, since it uses less digits than its factorization.

51777713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306403 (or 306390 counting only the distinct ones).

The product of its digits is 36015, while the sum is 38.

The square root of 51777713 is about 7195.6732138140. The cubic root of 51777713 is about 372.7185042968.

The spelling of 51777713 in words is "fifty-one million, seven hundred seventy-seven thousand, seven hundred thirteen".