1722021233 has 2 divisors, whose sum is σ = 1722021234. Its totient is φ = 1722021232.

The previous prime is 1722021209. The next prime is 1722021253. The reversal of 1722021233 is 3321202271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1121379169 + 600642064 = 33487^2 + 24508^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722021233 - 2¹⁴ = 1722004849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1722021199 and 1722021208.

It is not a weakly prime, because it can be changed into another prime (1722021253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861010616 + 861010617.

It is an arithmetic number, because the mean of its divisors is an integer number (861010617).

Almost surely, 2^1722021233 is an apocalyptic number.

It is an amenable number.

1722021233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722021233 is an equidigital number, since it uses as much as digits as its factorization.

1722021233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 1722021233 is about 41497.2436795506. The cubic root of 1722021233 is about 1198.6144269292.

The spelling of 1722021233 in words is "one billion, seven hundred twenty-two million, twenty-one thousand, two hundred thirty-three".