242128513 has 16 divisors (see below), whose sum is σ = 269127936. Its totient is φ = 215997840.

The previous prime is 242128487. The next prime is 242128519. The reversal of 242128513 is 315821242.

242128513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242128513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242128519) 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, 148006 + ... + 149632.

It is an arithmetic number, because the mean of its divisors is an integer number (16820496).

Almost surely, 2^242128513 is an apocalyptic number.

It is an amenable number.

242128513 is a deficient number, since it is larger than the sum of its proper divisors (26999423).

242128513 is a wasteful number, since it uses less digits than its factorization.

242128513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884.

The product of its digits is 3840, while the sum is 28.

The square root of 242128513 is about 15560.4792021326. The cubic root of 242128513 is about 623.2782590885.

Adding to 242128513 its reverse (315821242), we get a palindrome (557949755).

The spelling of 242128513 in words is "two hundred forty-two million, one hundred twenty-eight thousand, five hundred thirteen".