242312521 has 16 divisors (see below), whose sum is σ = 278443008. Its totient is φ = 208714000.

The previous prime is 242312503. The next prime is 242312531. The reversal of 242312521 is 125213242.

It is a happy number.

242312521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 242312521 - 2¹¹ = 242310473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242312492 and 242312501.

It is not an unprimeable number, because it can be changed into a prime (242312531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22596 + ... + 31546.

It is an arithmetic number, because the mean of its divisors is an integer number (17402688).

Almost surely, 2^242312521 is an apocalyptic number.

It is an amenable number.

242312521 is a deficient number, since it is larger than the sum of its proper divisors (36130487).

242312521 is a wasteful number, since it uses less digits than its factorization.

242312521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9092.

The product of its digits is 960, while the sum is 22.

The square root of 242312521 is about 15566.3907505883. The cubic root of 242312521 is about 623.4361079707.

Adding to 242312521 its reverse (125213242), we get a palindrome (367525763).

The spelling of 242312521 in words is "two hundred forty-two million, three hundred twelve thousand, five hundred twenty-one".