51658417 has 4 divisors (see below), whose sum is σ = 52191076. Its totient is φ = 51125760.

The previous prime is 51658403. The next prime is 51658429. The reversal of 51658417 is 71485615.

51658417 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.

It can be written as a sum of positive squares in 2 ways, for example, as 36048016 + 15610401 = 6004^2 + 3951^2 .

It is a cyclic number.

It is not a de Polignac number, because 51658417 - 2¹¹ = 51656369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51658457) 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, 266184 + ... + 266377.

It is an arithmetic number, because the mean of its divisors is an integer number (13047769).

Almost surely, 2^51658417 is an apocalyptic number.

It is an amenable number.

51658417 is a deficient number, since it is larger than the sum of its proper divisors (532659).

51658417 is an equidigital number, since it uses as much as digits as its factorization.

51658417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532658.

The product of its digits is 33600, while the sum is 37.

The square root of 51658417 is about 7187.3790076773. The cubic root of 51658417 is about 372.4320360067.

The spelling of 51658417 in words is "fifty-one million, six hundred fifty-eight thousand, four hundred seventeen".