5901781221 has 12 divisors (see below), whose sum is σ = 9742623072. Its totient is φ = 3372446376.

The previous prime is 5901781187. The next prime is 5901781243. The reversal of 5901781221 is 1221871095.

It is a happy number.

It is not a de Polignac number, because 5901781221 - 2²³ = 5893392613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5901781321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46839471 + ... + 46839596.

It is an arithmetic number, because the mean of its divisors is an integer number (811885256).

Almost surely, 2^5901781221 is an apocalyptic number.

It is an amenable number.

5901781221 is a deficient number, since it is larger than the sum of its proper divisors (3840841851).

5901781221 is a wasteful number, since it uses less digits than its factorization.

5901781221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93679080 (or 93679077 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 5901781221 is about 76823.0513648085. The cubic root of 5901781221 is about 1807.1506934483.

The spelling of 5901781221 in words is "five billion, nine hundred one million, seven hundred eighty-one thousand, two hundred twenty-one".