501401633 has 8 divisors (see below), whose sum is σ = 528597888. Its totient is φ = 474655104.

The previous prime is 501401617. The next prime is 501401653. The reversal of 501401633 is 336104105.

It is a happy number.

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 501401633 - 2⁴ = 501401617 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 501401599 and 501401608.

It is not an unprimeable number, because it can be changed into a prime (501401653) 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 7 ways as a sum of consecutive naturals, for example, 110141 + ... + 114602.

It is an arithmetic number, because the mean of its divisors is an integer number (66074736).

Almost surely, 2^501401633 is an apocalyptic number.

It is an amenable number.

501401633 is a deficient number, since it is larger than the sum of its proper divisors (27196255).

501401633 is a wasteful number, since it uses less digits than its factorization.

501401633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224863.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 501401633 is about 22391.9993077885. Note that the first 3 decimals coincide. The cubic root of 501401633 is about 794.4414852790.

Adding to 501401633 its reverse (336104105), we get a palindrome (837505738).

The spelling of 501401633 in words is "five hundred one million, four hundred one thousand, six hundred thirty-three".