1722216038401 has 4 divisors (see below), whose sum is σ = 1722218874304. Its totient is φ = 1722213202500.

The previous prime is 1722216038383. The next prime is 1722216038423. The reversal of 1722216038401 is 1048306122271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1722216038401 - 2⁷ = 1722216038273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1722216038461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96525 + ... + 1858426.

It is an arithmetic number, because the mean of its divisors is an integer number (430554718576).

Almost surely, 2^{1722216038401} is an apocalyptic number.

It is an amenable number.

1722216038401 is a deficient number, since it is larger than the sum of its proper divisors (2835903).

1722216038401 is an equidigital number, since it uses as much as digits as its factorization.

1722216038401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835902.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 1722216038401 in words is "one trillion, seven hundred twenty-two billion, two hundred sixteen million, thirty-eight thousand, four hundred one".