3817223521 has 2 divisors, whose sum is σ = 3817223522. Its totient is φ = 3817223520.

The previous prime is 3817223489. The next prime is 3817223539. The reversal of 3817223521 is 1253227183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2414346496 + 1402877025 = 49136^2 + 37455^2 .

It is a cyclic number.

It is not a de Polignac number, because 3817223521 - 2⁵ = 3817223489 is a prime.

It is not a weakly prime, because it can be changed into another prime (3817223551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1908611760 + 1908611761.

It is an arithmetic number, because the mean of its divisors is an integer number (1908611761).

Almost surely, 2^3817223521 is an apocalyptic number.

It is an amenable number.

3817223521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3817223521 is an equidigital number, since it uses as much as digits as its factorization.

3817223521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 3817223521 is about 61783.6832909790. The cubic root of 3817223521 is about 1562.8448419554.

The spelling of 3817223521 in words is "three billion, eight hundred seventeen million, two hundred twenty-three thousand, five hundred twenty-one".