243251478 has 32 divisors (see below), whose sum is σ = 559202400. Its totient is φ = 78287328.

The previous prime is 243251441. The next prime is 243251479. The reversal of 243251478 is 874152342.

It is a happy number.

243251478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243251479) 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, 76101 + ... + 79232.

It is an arithmetic number, because the mean of its divisors is an integer number (17475075).

Almost surely, 2^243251478 is an apocalyptic number.

243251478 is an abundant number, since it is smaller than the sum of its proper divisors (315950922).

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

243251478 is a wasteful number, since it uses less digits than its factorization.

243251478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155373 (or 155367 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 243251478 is about 15596.5213429149. The cubic root of 243251478 is about 624.2403382632.

The spelling of 243251478 in words is "two hundred forty-three million, two hundred fifty-one thousand, four hundred seventy-eight".