51081677 has 8 divisors (see below), whose sum is σ = 52122936. Its totient is φ = 50049792.

The previous prime is 51081661. The next prime is 51081691. The reversal of 51081677 is 77618015.

It can be written as a sum of positive squares in 4 ways, for example, as 8649481 + 42432196 = 2941^2 + 6514^2 .

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 51081677 - 2⁴ = 51081661 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 (51081607) 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, 9233 + ... + 13689.

It is an arithmetic number, because the mean of its divisors is an integer number (6515367).

Almost surely, 2^51081677 is an apocalyptic number.

It is an amenable number.

51081677 is a deficient number, since it is larger than the sum of its proper divisors (1041259).

51081677 is a wasteful number, since it uses less digits than its factorization.

51081677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 51081677 is about 7147.1446746236. The cubic root of 51081677 is about 371.0408408916.

The spelling of 51081677 in words is "fifty-one million, eighty-one thousand, six hundred seventy-seven".