242031513 has 4 divisors (see below), whose sum is σ = 322708688. Its totient is φ = 161354340.

The previous prime is 242031509. The next prime is 242031527. The reversal of 242031513 is 315130242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 242031513 - 2² = 242031509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242031513.

It is not an unprimeable number, because it can be changed into a prime (242031583) 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, 40338583 + ... + 40338588.

It is an arithmetic number, because the mean of its divisors is an integer number (80677172).

Almost surely, 2^242031513 is an apocalyptic number.

It is an amenable number.

242031513 is a deficient number, since it is larger than the sum of its proper divisors (80677175).

242031513 is an equidigital number, since it uses as much as digits as its factorization.

242031513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80677174.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 242031513 is about 15557.3620193142. The cubic root of 242031513 is about 623.1950167012.

Adding to 242031513 its reverse (315130242), we get a palindrome (557161755).

It can be divided in two parts, 2420 and 31513, that added together give a palindrome (33933).

The spelling of 242031513 in words is "two hundred forty-two million, thirty-one thousand, five hundred thirteen".