501650161 has 8 divisors (see below), whose sum is σ = 531390024. Its totient is φ = 471936000.

The previous prime is 501650119. The next prime is 501650183. The reversal of 501650161 is 161056105.

It can be written as a sum of positive squares in 4 ways, for example, as 145950561 + 355699600 = 12081^2 + 18860^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 501650161 - 2¹⁵ = 501617393 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501650101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46101 + ... + 55933.

It is an arithmetic number, because the mean of its divisors is an integer number (66423753).

Almost surely, 2^501650161 is an apocalyptic number.

It is an amenable number.

501650161 is a deficient number, since it is larger than the sum of its proper divisors (29739863).

501650161 is a wasteful number, since it uses less digits than its factorization.

501650161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12851.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 501650161 is about 22397.5481024151. The cubic root of 501650161 is about 794.5727229455.

The spelling of 501650161 in words is "five hundred one million, six hundred fifty thousand, one hundred sixty-one".