51071716 has 6 divisors (see below), whose sum is σ = 89375510. Its totient is φ = 25535856.

The previous prime is 51071693. The next prime is 51071717. The reversal of 51071716 is 61717015.

It can be written as a sum of positive squares in only one way, i.e., 51065316 + 6400 = 7146^2 + 80^2 .

It is not an unprimeable number, because it can be changed into a prime (51071717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6383961 + ... + 6383968.

Almost surely, 2^51071716 is an apocalyptic number.

It is an amenable number.

51071716 is a deficient number, since it is larger than the sum of its proper divisors (38303794).

51071716 is a wasteful number, since it uses less digits than its factorization.

51071716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12767933 (or 12767931 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 28.

The square root of 51071716 is about 7146.4477889368. The cubic root of 51071716 is about 371.0167214924.

The spelling of 51071716 in words is "fifty-one million, seventy-one thousand, seven hundred sixteen".