242378513 has 4 divisors (see below), whose sum is σ = 261023028. Its totient is φ = 223734000.

The previous prime is 242378489. The next prime is 242378519. The reversal of 242378513 is 315873242.

242378513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 131033809 + 111344704 = 11447^2 + 10552^2 .

It is a cyclic number.

It is not a de Polignac number, because 242378513 - 2¹² = 242374417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242378519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9322238 + ... + 9322263.

It is an arithmetic number, because the mean of its divisors is an integer number (65255757).

Almost surely, 2^242378513 is an apocalyptic number.

It is an amenable number.

242378513 is a deficient number, since it is larger than the sum of its proper divisors (18644515).

242378513 is a wasteful number, since it uses less digits than its factorization.

242378513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18644514.

The product of its digits is 40320, while the sum is 35.

The square root of 242378513 is about 15568.5103012459. The cubic root of 242378513 is about 623.4926988850.

The spelling of 242378513 in words is "two hundred forty-two million, three hundred seventy-eight thousand, five hundred thirteen".