1921481301 has 4 divisors (see below), whose sum is σ = 2561975072. Its totient is φ = 1280987532.

The previous prime is 1921481281. The next prime is 1921481311. The reversal of 1921481301 is 1031841291.

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 not a de Polignac number, because 1921481301 - 2⁵ = 1921481269 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 (1921481311) 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 3 ways as a sum of consecutive naturals, for example, 320246881 + ... + 320246886.

It is an arithmetic number, because the mean of its divisors is an integer number (640493768).

Almost surely, 2^1921481301 is an apocalyptic number.

It is an amenable number.

1921481301 is a deficient number, since it is larger than the sum of its proper divisors (640493771).

1921481301 is an equidigital number, since it uses as much as digits as its factorization.

1921481301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640493770.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1921481301 is about 43834.7042992194. The cubic root of 1921481301 is about 1243.2125553979.

The spelling of 1921481301 in words is "one billion, nine hundred twenty-one million, four hundred eighty-one thousand, three hundred one".