243155055442 has 32 divisors (see below), whose sum is σ = 395155398960. Its totient is φ = 111551247360.

The previous prime is 243155055419. The next prime is 243155055487. The reversal of 243155055442 is 244550551342.

It can be written as a sum of positive squares in 8 ways, for example, as 205282392561 + 37872662881 = 453081^2 + 194609^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243155055395 and 243155055404.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2947468 + ... + 3028840.

Almost surely, 2^243155055442 is an apocalyptic number.

243155055442 is a deficient number, since it is larger than the sum of its proper divisors (152000343518).

243155055442 is a wasteful number, since it uses less digits than its factorization.

243155055442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82078.

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 243155055442 in words is "two hundred forty-three billion, one hundred fifty-five million, fifty-five thousand, four hundred forty-two".