243400552 has 8 divisors (see below), whose sum is σ = 456376050. Its totient is φ = 121700272.

The previous prime is 243400529. The next prime is 243400579. The reversal of 243400552 is 255004342.

It can be written as a sum of positive squares in only one way, i.e., 223024356 + 20376196 = 14934^2 + 4514^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15212527 + ... + 15212542.

Almost surely, 2^243400552 is an apocalyptic number.

It is an amenable number.

243400552 is a deficient number, since it is larger than the sum of its proper divisors (212975498).

243400552 is a wasteful number, since it uses less digits than its factorization.

243400552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30425075 (or 30425071 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 243400552 is about 15601.2996894490. The cubic root of 243400552 is about 624.3678318370.

Adding to 243400552 its reverse (255004342), we get a palindrome (498404894).

The spelling of 243400552 in words is "two hundred forty-three million, four hundred thousand, five hundred fifty-two".