243540154 has 48 divisors (see below), whose sum is σ = 445665024. Its totient is φ = 98841600.

The previous prime is 243540149. The next prime is 243540161. The reversal of 243540154 is 451045342.

It is a super-3 number, since 3×243540154³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114202 + ... + 116314.

It is an arithmetic number, because the mean of its divisors is an integer number (9284688).

Almost surely, 2^243540154 is an apocalyptic number.

243540154 is a deficient number, since it is larger than the sum of its proper divisors (202124870).

243540154 is a wasteful number, since it uses less digits than its factorization.

243540154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183 (or 2170 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 243540154 is about 15605.7730984402. The cubic root of 243540154 is about 624.4871774159.

Adding to 243540154 its reverse (451045342), we get a palindrome (694585496).

The spelling of 243540154 in words is "two hundred forty-three million, five hundred forty thousand, one hundred fifty-four".