240421542415 has 4 divisors (see below), whose sum is σ = 288505850904. Its totient is φ = 192337233928.

The previous prime is 240421542379. The next prime is 240421542457. The reversal of 240421542415 is 514245124042.

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

It is a cyclic number.

It is not a de Polignac number, because 240421542415 - 2²³ = 240413153807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24042154237 + ... + 24042154246.

It is an arithmetic number, because the mean of its divisors is an integer number (72126462726).

Almost surely, 2^240421542415 is an apocalyptic number.

240421542415 is a deficient number, since it is larger than the sum of its proper divisors (48084308489).

240421542415 is an equidigital number, since it uses as much as digits as its factorization.

240421542415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48084308488.

The product of its (nonzero) digits is 51200, while the sum is 34.

Adding to 240421542415 its reverse (514245124042), we get a palindrome (754666666457).

The spelling of 240421542415 in words is "two hundred forty billion, four hundred twenty-one million, five hundred forty-two thousand, four hundred fifteen".