163226752621 has 2 divisors, whose sum is σ = 163226752622. Its totient is φ = 163226752620.

The previous prime is 163226752571. The next prime is 163226752697. The reversal of 163226752621 is 126257622361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128802032100 + 34424720521 = 358890^2 + 185539^2 .

It is a cyclic number.

It is not a de Polignac number, because 163226752621 - 2⁹ = 163226752109 is a prime.

It is a super-3 number, since 3×163226752621³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163226752321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81613376310 + 81613376311.

It is an arithmetic number, because the mean of its divisors is an integer number (81613376311).

Almost surely, 2^163226752621 is an apocalyptic number.

It is an amenable number.

163226752621 is a deficient number, since it is larger than the sum of its proper divisors (1).

163226752621 is an equidigital number, since it uses as much as digits as its factorization.

163226752621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The spelling of 163226752621 in words is "one hundred sixty-three billion, two hundred twenty-six million, seven hundred fifty-two thousand, six hundred twenty-one".