51077809 has 8 divisors (see below), whose sum is σ = 54286848. Its totient is φ = 47891520.

The previous prime is 51077783. The next prime is 51077813. The reversal of 51077809 is 90877015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51077809 - 2¹⁷ = 50946737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51077869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937 + ... + 10150.

It is an arithmetic number, because the mean of its divisors is an integer number (6785856).

Almost surely, 2^51077809 is an apocalyptic number.

It is an amenable number.

51077809 is a deficient number, since it is larger than the sum of its proper divisors (3209039).

51077809 is a wasteful number, since it uses less digits than its factorization.

51077809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11375.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 51077809 is about 7146.8740719282. The cubic root of 51077809 is about 371.0314753533.

The spelling of 51077809 in words is "fifty-one million, seventy-seven thousand, eight hundred nine".