243420354519 has 16 divisors (see below), whose sum is σ = 325416672000. Its totient is φ = 161852291136.

The previous prime is 243420354493. The next prime is 243420354523. The reversal of 243420354519 is 915453024342.

It is not a de Polignac number, because 243420354519 - 2¹⁵ = 243420321751 is a prime.

It is a super-2 number, since 2×243420354519² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243420354589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7590172 + ... + 7622174.

It is an arithmetic number, because the mean of its divisors is an integer number (20338542000).

Almost surely, 2^243420354519 is an apocalyptic number.

243420354519 is a deficient number, since it is larger than the sum of its proper divisors (81996317481).

243420354519 is a wasteful number, since it uses less digits than its factorization.

243420354519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38614.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 243420354519 in words is "two hundred forty-three billion, four hundred twenty million, three hundred fifty-four thousand, five hundred nineteen".