16353225521 has 2 divisors, whose sum is σ = 16353225522. Its totient is φ = 16353225520.

The previous prime is 16353225503. The next prime is 16353225529. The reversal of 16353225521 is 12552235361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10556535025 + 5796690496 = 102745^2 + 76136^2 .

It is an emirp because it is prime and its reverse (12552235361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16353225521 - 2²² = 16349031217 is a prime.

It is a super-3 number, since 3×16353225521³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16353225529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8176612760 + 8176612761.

It is an arithmetic number, because the mean of its divisors is an integer number (8176612761).

Almost surely, 2^16353225521 is an apocalyptic number.

It is an amenable number.

16353225521 is a deficient number, since it is larger than the sum of its proper divisors (1).

16353225521 is an equidigital number, since it uses as much as digits as its factorization.

16353225521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 35.

The spelling of 16353225521 in words is "sixteen billion, three hundred fifty-three million, two hundred twenty-five thousand, five hundred twenty-one".