501663145 has 8 divisors (see below), whose sum is σ = 608202504. Its totient is φ = 397192704.

The previous prime is 501663133. The next prime is 501663181. The reversal of 501663145 is 541366105.

It can be written as a sum of positive squares in 4 ways, for example, as 16386304 + 485276841 = 4048^2 + 22029^2 .

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 501663145 - 2¹⁹ = 501138857 is a prime.

It is a super-2 number, since 2×501663145² = 503331822102582050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 516694 + ... + 517663.

It is an arithmetic number, because the mean of its divisors is an integer number (76025313).

Almost surely, 2^501663145 is an apocalyptic number.

It is an amenable number.

501663145 is a deficient number, since it is larger than the sum of its proper divisors (106539359).

501663145 is a wasteful number, since it uses less digits than its factorization.

501663145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034459.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 501663145 is about 22397.8379536954. The cubic root of 501663145 is about 794.5795780835.

The spelling of 501663145 in words is "five hundred one million, six hundred sixty-three thousand, one hundred forty-five".