1955281219 has 4 divisors (see below), whose sum is σ = 1959034680. Its totient is φ = 1951527760.

The previous prime is 1955281201. The next prime is 1955281249. The reversal of 1955281219 is 9121825591.

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 1955281219 - 2⁵ = 1955281187 is a prime.

It is a super-2 number, since 2×1955281219² = 7646249290748251922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955281249) 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, 1875949 + ... + 1876990.

It is an arithmetic number, because the mean of its divisors is an integer number (489758670).

Almost surely, 2^1955281219 is an apocalyptic number.

1955281219 is a deficient number, since it is larger than the sum of its proper divisors (3753461).

1955281219 is an equidigital number, since it uses as much as digits as its factorization.

1955281219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753460.

The product of its digits is 64800, while the sum is 43.

The square root of 1955281219 is about 44218.5619282220. The cubic root of 1955281219 is about 1250.4598242153.

The spelling of 1955281219 in words is "one billion, nine hundred fifty-five million, two hundred eighty-one thousand, two hundred nineteen".