1722220057 has 8 divisors (see below), whose sum is σ = 1730672352. Its totient is φ = 1713784800.

The previous prime is 1722220051. The next prime is 1722220061. The reversal of 1722220057 is 7500222271.

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 1722220057 - 2⁷ = 1722219929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1722220051) 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, 228682 + ... + 236092.

It is an arithmetic number, because the mean of its divisors is an integer number (216334044).

Almost surely, 2^1722220057 is an apocalyptic number.

It is an amenable number.

1722220057 is a deficient number, since it is larger than the sum of its proper divisors (8452295).

1722220057 is an equidigital number, since it uses as much as digits as its factorization.

1722220057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8519.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 1722220057 is about 41499.6392393958. The cubic root of 1722220057 is about 1198.6605556952.

The spelling of 1722220057 in words is "one billion, seven hundred twenty-two million, two hundred twenty thousand, fifty-seven".