51916785 has 32 divisors (see below), whose sum is σ = 86261760. Its totient is φ = 26635200.

The previous prime is 51916763. The next prime is 51916801. The reversal of 51916785 is 58761915.

It is not a de Polignac number, because 51916785 - 2⁹ = 51916273 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144436 + ... + 144794.

It is an arithmetic number, because the mean of its divisors is an integer number (2695680).

Almost surely, 2^51916785 is an apocalyptic number.

It is an amenable number.

51916785 is a deficient number, since it is larger than the sum of its proper divisors (34344975).

51916785 is a wasteful number, since it uses less digits than its factorization.

51916785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709.

The product of its digits is 75600, while the sum is 42.

The square root of 51916785 is about 7205.3303185905. The cubic root of 51916785 is about 373.0519062285.

The spelling of 51916785 in words is "fifty-one million, nine hundred sixteen thousand, seven hundred eighty-five".