243155142 has 16 divisors (see below), whose sum is σ = 540344880. Its totient is φ = 81051696.

The previous prime is 243155117. The next prime is 243155161. The reversal of 243155142 is 241551342.

243155142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251383 + ... + 2251490.

It is an arithmetic number, because the mean of its divisors is an integer number (33771555).

Almost surely, 2^243155142 is an apocalyptic number.

243155142 is an abundant number, since it is smaller than the sum of its proper divisors (297189738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243155142 is a wasteful number, since it uses less digits than its factorization.

243155142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502884 (or 4502878 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 243155142 is about 15593.4326560896. The cubic root of 243155142 is about 624.1579204595.

The spelling of 243155142 in words is "two hundred forty-three million, one hundred fifty-five thousand, one hundred forty-two".