1801223195 has 4 divisors (see below), whose sum is σ = 2161467840. Its totient is φ = 1440978552.

The previous prime is 1801223191. The next prime is 1801223201. The reversal of 1801223195 is 5913221081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1801223195 - 2² = 1801223191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1801223191) 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, 180122315 + ... + 180122324.

It is an arithmetic number, because the mean of its divisors is an integer number (540366960).

Almost surely, 2^1801223195 is an apocalyptic number.

1801223195 is a deficient number, since it is larger than the sum of its proper divisors (360244645).

1801223195 is an equidigital number, since it uses as much as digits as its factorization.

1801223195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360244644.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1801223195 is about 42440.8199143231. The cubic root of 1801223195 is about 1216.7158818731.

The spelling of 1801223195 in words is "one billion, eight hundred one million, two hundred twenty-three thousand, one hundred ninety-five".