51650329 has 4 divisors (see below), whose sum is σ = 51834420. Its totient is φ = 51466240.

The previous prime is 51650323. The next prime is 51650351. The reversal of 51650329 is 92305615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92305615 = 5 ⋅18461123.

It can be written as a sum of positive squares in 2 ways, for example, as 45198729 + 6451600 = 6723^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 51650329 - 2⁵ = 51650297 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 51650329.

It is not an unprimeable number, because it can be changed into a prime (51650323) 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, 91624 + ... + 92185.

It is an arithmetic number, because the mean of its divisors is an integer number (12958605).

Almost surely, 2^51650329 is an apocalyptic number.

It is an amenable number.

51650329 is a deficient number, since it is larger than the sum of its proper divisors (184091).

51650329 is a wasteful number, since it uses less digits than its factorization.

51650329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184090.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 51650329 is about 7186.8163327025. The cubic root of 51650329 is about 372.4125981448.

The spelling of 51650329 in words is "fifty-one million, six hundred fifty thousand, three hundred twenty-nine".