243125554 has 12 divisors (see below), whose sum is σ = 424229454. Its totient is φ = 104196624.

The previous prime is 243125471. The next prime is 243125563. The reversal of 243125554 is 455521342.

It can be written as a sum of positive squares in only one way, i.e., 208138329 + 34987225 = 14427^2 + 5915^2 .

It is a super-2 number, since 2×243125554² = 118220070015613832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1240339 + ... + 1240534.

Almost surely, 2^243125554 is an apocalyptic number.

243125554 is a deficient number, since it is larger than the sum of its proper divisors (181103900).

243125554 is a wasteful number, since it uses less digits than its factorization.

243125554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480889 (or 2480882 counting only the distinct ones).

The product of its digits is 24000, while the sum is 31.

The square root of 243125554 is about 15592.4838944922. The cubic root of 243125554 is about 624.1326028323.

Adding to 243125554 its reverse (455521342), we get a palindrome (698646896).

The spelling of 243125554 in words is "two hundred forty-three million, one hundred twenty-five thousand, five hundred fifty-four".