240420513 has 4 divisors (see below), whose sum is σ = 320560688. Its totient is φ = 160280340.

The previous prime is 240420503. The next prime is 240420517. The reversal of 240420513 is 315024042.

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 240420513 - 2¹⁰ = 240419489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 240420513.

It is not an unprimeable number, because it can be changed into a prime (240420517) 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, 40070083 + ... + 40070088.

It is an arithmetic number, because the mean of its divisors is an integer number (80140172).

Almost surely, 2^240420513 is an apocalyptic number.

It is an amenable number.

240420513 is a deficient number, since it is larger than the sum of its proper divisors (80140175).

240420513 is an equidigital number, since it uses as much as digits as its factorization.

240420513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80140174.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 240420513 is about 15505.4994437458. The cubic root of 240420513 is about 621.8092426552.

Adding to 240420513 its reverse (315024042), we get a palindrome (555444555).

The spelling of 240420513 in words is "two hundred forty million, four hundred twenty thousand, five hundred thirteen".