51963811 has 4 divisors (see below), whose sum is σ = 53069472. Its totient is φ = 50858152.

The previous prime is 51963767. The next prime is 51963817. The reversal of 51963811 is 11836915.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51963811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51963817) 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, 552760 + ... + 552853.

It is an arithmetic number, because the mean of its divisors is an integer number (13267368).

Almost surely, 2^51963811 is an apocalyptic number.

51963811 is a deficient number, since it is larger than the sum of its proper divisors (1105661).

51963811 is a wasteful number, since it uses less digits than its factorization.

51963811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105660.

The product of its digits is 6480, while the sum is 34.

The square root of 51963811 is about 7208.5928585266. The cubic root of 51963811 is about 373.1645085065.

The spelling of 51963811 in words is "fifty-one million, nine hundred sixty-three thousand, eight hundred eleven".