51766511 has 4 divisors (see below), whose sum is σ = 52096392. Its totient is φ = 51436632.

The previous prime is 51766489. The next prime is 51766523. The reversal of 51766511 is 11566715.

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 51766511 - 2²² = 47572207 is a prime.

It is a super-2 number, since 2×51766511² = 5359543322226242, 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 (51766571) 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, 164705 + ... + 165018.

It is an arithmetic number, because the mean of its divisors is an integer number (13024098).

Almost surely, 2^51766511 is an apocalyptic number.

51766511 is a deficient number, since it is larger than the sum of its proper divisors (329881).

51766511 is a wasteful number, since it uses less digits than its factorization.

51766511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329880.

The product of its digits is 6300, while the sum is 32.

The square root of 51766511 is about 7194.8947872780. The cubic root of 51766511 is about 372.6916234017.

The spelling of 51766511 in words is "fifty-one million, seven hundred sixty-six thousand, five hundred eleven".