51766831 has 4 divisors (see below), whose sum is σ = 51799000. Its totient is φ = 51734664.

The previous prime is 51766829. The next prime is 51766837. The reversal of 51766831 is 13866715.

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

It is a cyclic number.

It is not a de Polignac number, because 51766831 - 2¹ = 51766829 is a prime.

It is a super-2 number, since 2×51766831² = 5359609583565122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51766837) 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, 13536 + ... + 16933.

It is an arithmetic number, because the mean of its divisors is an integer number (12949750).

Almost surely, 2^51766831 is an apocalyptic number.

51766831 is a deficient number, since it is larger than the sum of its proper divisors (32169).

51766831 is a wasteful number, since it uses less digits than its factorization.

51766831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32168.

The product of its digits is 30240, while the sum is 37.

The square root of 51766831 is about 7194.9170252339. The cubic root of 51766831 is about 372.6923913439.

The spelling of 51766831 in words is "fifty-one million, seven hundred sixty-six thousand, eight hundred thirty-one".