242621315 has 4 divisors (see below), whose sum is σ = 291145584. Its totient is φ = 194097048.

The previous prime is 242621293. The next prime is 242621329. The reversal of 242621315 is 513126242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 513126242 = 2 ⋅256563121.

It is a cyclic number.

It is not a de Polignac number, because 242621315 - 2²² = 238427011 is a prime.

It is a Duffinian 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, 24262127 + ... + 24262136.

It is an arithmetic number, because the mean of its divisors is an integer number (72786396).

Almost surely, 2^242621315 is an apocalyptic number.

242621315 is a deficient number, since it is larger than the sum of its proper divisors (48524269).

242621315 is an equidigital number, since it uses as much as digits as its factorization.

242621315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48524268.

The product of its digits is 2880, while the sum is 26.

The square root of 242621315 is about 15576.3062052593. The cubic root of 242621315 is about 623.7008234289.

Adding to 242621315 its reverse (513126242), we get a palindrome (755747557).

The spelling of 242621315 in words is "two hundred forty-two million, six hundred twenty-one thousand, three hundred fifteen".