242213523 has 4 divisors (see below), whose sum is σ = 322951368. Its totient is φ = 161475680.

The previous prime is 242213497. The next prime is 242213533. The reversal of 242213523 is 325312242.

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

It is a cyclic number.

It is not a de Polignac number, because 242213523 - 2⁸ = 242213267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242213493 and 242213502.

It is not an unprimeable number, because it can be changed into a prime (242213533) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 40368918 + ... + 40368923.

It is an arithmetic number, because the mean of its divisors is an integer number (80737842).

Almost surely, 2^242213523 is an apocalyptic number.

242213523 is a deficient number, since it is larger than the sum of its proper divisors (80737845).

242213523 is an equidigital number, since it uses as much as digits as its factorization.

242213523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80737844.

The product of its digits is 2880, while the sum is 24.

The square root of 242213523 is about 15563.2105620916. The cubic root of 242213523 is about 623.3511937524.

Adding to 242213523 its reverse (325312242), we get a palindrome (567525765).

The spelling of 242213523 in words is "two hundred forty-two million, two hundred thirteen thousand, five hundred twenty-three".