2221801 has 4 divisors (see below), whose sum is σ = 2293504. Its totient is φ = 2150100.

The previous prime is 2221789. The next prime is 2221829. The reversal of 2221801 is 1081222.

2221801 = T₃₆₃ + T₃₆₄ + ... + T₃₉₃.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1081222 = 2 ⋅540611.

It is a cyclic number.

It is not a de Polignac number, because 2221801 - 2⁷ = 2221673 is a prime.

2221801 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2221861) 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, 35805 + ... + 35866.

It is an arithmetic number, because the mean of its divisors is an integer number (573376).

2^2221801 is an apocalyptic number.

It is an amenable number.

2221801 is a deficient number, since it is larger than the sum of its proper divisors (71703).

2221801 is an equidigital number, since it uses as much as digits as its factorization.

2221801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71702.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 2221801 is about 1490.5706960758. The cubic root of 2221801 is about 130.4873423717.

The spelling of 2221801 in words is "two million, two hundred twenty-one thousand, eight hundred one".