501050561 has 16 divisors (see below), whose sum is σ = 571183488. Its totient is φ = 435072000.

The previous prime is 501050533. The next prime is 501050567. The reversal of 501050561 is 165050105.

It is not a de Polignac number, because 501050561 - 2¹⁸ = 500788417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (501050567) 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 15 ways as a sum of consecutive naturals, for example, 312161 + ... + 313761.

It is an arithmetic number, because the mean of its divisors is an integer number (35698968).

Almost surely, 2^501050561 is an apocalyptic number.

It is an amenable number.

501050561 is a deficient number, since it is larger than the sum of its proper divisors (70132927).

501050561 is a wasteful number, since it uses less digits than its factorization.

501050561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 501050561 is about 22384.1587065496. The cubic root of 501050561 is about 794.2560243212.

The spelling of 501050561 in words is "five hundred one million, fifty thousand, five hundred sixty-one".