51646411 has 4 divisors (see below), whose sum is σ = 51722712. Its totient is φ = 51570112.

The previous prime is 51646409. The next prime is 51646421. The reversal of 51646411 is 11464615.

51646411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11464615 = 5 ⋅2292923.

It is a cyclic number.

It is not a de Polignac number, because 51646411 - 2¹ = 51646409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51646411.

It is not an unprimeable number, because it can be changed into a prime (51646421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37126 + ... + 38491.

It is an arithmetic number, because the mean of its divisors is an integer number (12930678).

Almost surely, 2^51646411 is an apocalyptic number.

51646411 is a deficient number, since it is larger than the sum of its proper divisors (76301).

51646411 is an equidigital number, since it uses as much as digits as its factorization.

51646411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76300.

The product of its digits is 2880, while the sum is 28.

The square root of 51646411 is about 7186.5437450836. The cubic root of 51646411 is about 372.4031812996.

The spelling of 51646411 in words is "fifty-one million, six hundred forty-six thousand, four hundred eleven".