1720222365 has 8 divisors (see below), whose sum is σ = 2752355808. Its totient is φ = 917451920.

The previous prime is 1720222327. The next prime is 1720222369. The reversal of 1720222365 is 5632220271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1720222365 - 2¹⁶ = 1720156829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720222369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57340731 + ... + 57340760.

It is an arithmetic number, because the mean of its divisors is an integer number (344044476).

Almost surely, 2^1720222365 is an apocalyptic number.

1720222365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1720222365 is a deficient number, since it is larger than the sum of its proper divisors (1032133443).

1720222365 is a wasteful number, since it uses less digits than its factorization.

1720222365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114681499.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 1720222365 is about 41475.5634681435. The cubic root of 1720222365 is about 1198.1969136176.

The spelling of 1720222365 in words is "one billion, seven hundred twenty million, two hundred twenty-two thousand, three hundred sixty-five".