1951045243 has 4 divisors (see below), whose sum is σ = 2229766000. Its totient is φ = 1672324488.

The previous prime is 1951045241. The next prime is 1951045253. The reversal of 1951045243 is 3425401591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3425401591 = 883 ⋅3879277.

It is a cyclic number.

It is not a de Polignac number, because 1951045243 - 2¹ = 1951045241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1951045199 and 1951045208.

It is not an unprimeable number, because it can be changed into a prime (1951045241) 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, 139360368 + ... + 139360381.

It is an arithmetic number, because the mean of its divisors is an integer number (557441500).

Almost surely, 2^1951045243 is an apocalyptic number.

1951045243 is a deficient number, since it is larger than the sum of its proper divisors (278720757).

1951045243 is an equidigital number, since it uses as much as digits as its factorization.

1951045243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278720756.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1951045243 is about 44170.6377925427. The cubic root of 1951045243 is about 1249.5561609308.

The spelling of 1951045243 in words is "one billion, nine hundred fifty-one million, forty-five thousand, two hundred forty-three".