51916811 has 4 divisors (see below), whose sum is σ = 53021472. Its totient is φ = 50812152.

The previous prime is 51916801. The next prime is 51916831. The reversal of 51916811 is 11861915.

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 51916811 - 2⁶ = 51916747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51916801) 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, 552260 + ... + 552353.

It is an arithmetic number, because the mean of its divisors is an integer number (13255368).

Almost surely, 2^51916811 is an apocalyptic number.

51916811 is a deficient number, since it is larger than the sum of its proper divisors (1104661).

51916811 is a wasteful number, since it uses less digits than its factorization.

51916811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104660.

The product of its digits is 2160, while the sum is 32.

The square root of 51916811 is about 7205.3321228102. The cubic root of 51916811 is about 373.0519685034.

The spelling of 51916811 in words is "fifty-one million, nine hundred sixteen thousand, eight hundred eleven".