243572542 has 4 divisors (see below), whose sum is σ = 365358816. Its totient is φ = 121786270.

The previous prime is 243572519. The next prime is 243572557. The reversal of 243572542 is 245275342.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 243572498 and 243572507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60893134 + ... + 60893137.

It is an arithmetic number, because the mean of its divisors is an integer number (91339704).

Almost surely, 2^243572542 is an apocalyptic number.

243572542 is a deficient number, since it is larger than the sum of its proper divisors (121786274).

243572542 is a wasteful number, since it uses less digits than its factorization.

243572542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121786273.

The product of its digits is 67200, while the sum is 34.

The square root of 243572542 is about 15606.8107568459. The cubic root of 243572542 is about 624.5148593591.

Subtracting from 243572542 its product of digits (67200), we obtain a palindrome (243505342).

The spelling of 243572542 in words is "two hundred forty-three million, five hundred seventy-two thousand, five hundred forty-two".