243421452515 has 32 divisors (see below), whose sum is σ = 300495856320. Its totient is φ = 189231552000.

The previous prime is 243421452509. The next prime is 243421452553. The reversal of 243421452515 is 515254124342.

It is not a de Polignac number, because 243421452515 - 2¹⁰ = 243421451491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11525465 + ... + 11546565.

It is an arithmetic number, because the mean of its divisors is an integer number (9390495510).

Almost surely, 2^243421452515 is an apocalyptic number.

243421452515 is a deficient number, since it is larger than the sum of its proper divisors (57074403805).

243421452515 is a wasteful number, since it uses less digits than its factorization.

243421452515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21623.

The product of its digits is 192000, while the sum is 38.

Adding to 243421452515 its reverse (515254124342), we get a palindrome (758675576857).

The spelling of 243421452515 in words is "two hundred forty-three billion, four hundred twenty-one million, four hundred fifty-two thousand, five hundred fifteen".