503440320101 has 2 divisors, whose sum is σ = 503440320102. Its totient is φ = 503440320100.

The previous prime is 503440320049. The next prime is 503440320139. The reversal of 503440320101 is 101023044305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359988000100 + 143452320001 = 599990^2 + 378751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-503440320101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503440320161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251720160050 + 251720160051.

It is an arithmetic number, because the mean of its divisors is an integer number (251720160051).

Almost surely, 2^503440320101 is an apocalyptic number.

It is an amenable number.

503440320101 is a deficient number, since it is larger than the sum of its proper divisors (1).

503440320101 is an equidigital number, since it uses as much as digits as its factorization.

503440320101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 503440320101 its reverse (101023044305), we get a palindrome (604463364406).

The spelling of 503440320101 in words is "five hundred three billion, four hundred forty million, three hundred twenty thousand, one hundred one".