51617677 has 4 divisors (see below), whose sum is σ = 52149916. Its totient is φ = 51085440.

The previous prime is 51617663. The next prime is 51617711. The reversal of 51617677 is 77671615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12916836 + 38700841 = 3594^2 + 6221^2 .

It is a cyclic number.

It is not a de Polignac number, because 51617677 - 2¹⁵ = 51584909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51617777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265974 + ... + 266167.

It is an arithmetic number, because the mean of its divisors is an integer number (13037479).

Almost surely, 2^51617677 is an apocalyptic number.

It is an amenable number.

51617677 is a deficient number, since it is larger than the sum of its proper divisors (532239).

51617677 is an equidigital number, since it uses as much as digits as its factorization.

51617677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532238.

The product of its digits is 61740, while the sum is 40.

The square root of 51617677 is about 7184.5443140118. The cubic root of 51617677 is about 372.3341050696.

The spelling of 51617677 in words is "fifty-one million, six hundred seventeen thousand, six hundred seventy-seven".