243155055419 has 2 divisors, whose sum is σ = 243155055420. Its totient is φ = 243155055418.

The previous prime is 243155055383. The next prime is 243155055487. The reversal of 243155055419 is 914550551342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243155055419 is a prime.

It is a super-2 number, since 2×243155055419² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243155055419.

It is not a weakly prime, because it can be changed into another prime (243155055019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121577527709 + 121577527710.

It is an arithmetic number, because the mean of its divisors is an integer number (121577527710).

Almost surely, 2^243155055419 is an apocalyptic number.

243155055419 is a deficient number, since it is larger than the sum of its proper divisors (1).

243155055419 is an equidigital number, since it uses as much as digits as its factorization.

243155055419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 243155055419 in words is "two hundred forty-three billion, one hundred fifty-five million, fifty-five thousand, four hundred nineteen".