501044081 has 2 divisors, whose sum is σ = 501044082. Its totient is φ = 501044080.

The previous prime is 501043999. The next prime is 501044099. The reversal of 501044081 is 180440105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501043456 + 625 = 22384^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 501044081 - 2¹⁴ = 501027697 is a prime.

It is a super-2 number, since 2×501044081² = 502090342210269122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (501044681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250522040 + 250522041.

It is an arithmetic number, because the mean of its divisors is an integer number (250522041).

Almost surely, 2^501044081 is an apocalyptic number.

It is an amenable number.

501044081 is a deficient number, since it is larger than the sum of its proper divisors (1).

501044081 is an equidigital number, since it uses as much as digits as its factorization.

501044081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 501044081 is about 22384.0139608605. The cubic root of 501044081 is about 794.2526003146.

Adding to 501044081 its reverse (180440105), we get a palindrome (681484186).

The spelling of 501044081 in words is "five hundred one million, forty-four thousand, eighty-one".