243154523420 has 48 divisors (see below), whose sum is σ = 540903974688. Its totient is φ = 91499427840.

The previous prime is 243154523411. The next prime is 243154523473. The reversal of 243154523420 is 24325451342.

It is a happy number.

It is a congruent number.

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, 603200 + ... + 922040.

It is an arithmetic number, because the mean of its divisors is an integer number (11268832806).

Almost surely, 2^243154523420 is an apocalyptic number.

243154523420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243154523420 is an abundant number, since it is smaller than the sum of its proper divisors (297749451268).

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

243154523420 is a wasteful number, since it uses less digits than its factorization.

243154523420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321110 (or 321108 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 243154523420 its reverse (24325451342), we get a palindrome (267479974762).

The spelling of 243154523420 in words is "two hundred forty-three billion, one hundred fifty-four million, five hundred twenty-three thousand, four hundred twenty".