1720222149 has 8 divisors (see below), whose sum is σ = 2293822080. Its totient is φ = 1146718496.

The previous prime is 1720222139. The next prime is 1720222157. The reversal of 1720222149 is 9412220271.

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

It is a cyclic number.

It is not a de Polignac number, because 1720222149 - 2¹⁵ = 1720189381 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 (1720222139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51697 + ... + 78185.

It is an arithmetic number, because the mean of its divisors is an integer number (286727760).

Almost surely, 2^1720222149 is an apocalyptic number.

It is an amenable number.

1720222149 is a deficient number, since it is larger than the sum of its proper divisors (573599931).

1720222149 is a wasteful number, since it uses less digits than its factorization.

1720222149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48139.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1720222149 is about 41475.5608642005. The cubic root of 1720222149 is about 1198.1968634671.

The spelling of 1720222149 in words is "one billion, seven hundred twenty million, two hundred twenty-two thousand, one hundred forty-nine".