373805221 has 4 divisors (see below), whose sum is σ = 393479200. Its totient is φ = 354131244.

The previous prime is 373805189. The next prime is 373805227. The reversal of 373805221 is 122508373.

373805221 = 1754² + 1755² + ... + 1867².

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 373805221 - 2⁵ = 373805189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (373805227) 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, 9836961 + ... + 9836998.

It is an arithmetic number, because the mean of its divisors is an integer number (98369800).

Almost surely, 2^373805221 is an apocalyptic number.

It is an amenable number.

373805221 is a deficient number, since it is larger than the sum of its proper divisors (19673979).

373805221 is a wasteful number, since it uses less digits than its factorization.

373805221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19673978.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 373805221 is about 19334.0430588121. The cubic root of 373805221 is about 720.3581172444.

The spelling of 373805221 in words is "three hundred seventy-three million, eight hundred five thousand, two hundred twenty-one".