73351103521 has 2 divisors, whose sum is σ = 73351103522. Its totient is φ = 73351103520.

The previous prime is 73351103503. The next prime is 73351103563. The reversal of 73351103521 is 12530115337.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38769610000 + 34581493521 = 196900^2 + 185961^2 .

It is a cyclic number.

It is not a de Polignac number, because 73351103521 - 2¹³ = 73351095329 is a prime.

It is not a weakly prime, because it can be changed into another prime (73351103321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36675551760 + 36675551761.

It is an arithmetic number, because the mean of its divisors is an integer number (36675551761).

Almost surely, 2^73351103521 is an apocalyptic number.

It is an amenable number.

73351103521 is a deficient number, since it is larger than the sum of its proper divisors (1).

73351103521 is an equidigital number, since it uses as much as digits as its factorization.

73351103521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 31.

Adding to 73351103521 its reverse (12530115337), we get a palindrome (85881218858).

The spelling of 73351103521 in words is "seventy-three billion, three hundred fifty-one million, one hundred three thousand, five hundred twenty-one".