242151515 has 4 divisors (see below), whose sum is σ = 290581824. Its totient is φ = 193721208.

The previous prime is 242151499. The next prime is 242151529. The reversal of 242151515 is 515151242.

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 242151515 - 2⁴ = 242151499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24215147 + ... + 24215156.

It is an arithmetic number, because the mean of its divisors is an integer number (72645456).

Almost surely, 2^242151515 is an apocalyptic number.

242151515 is a deficient number, since it is larger than the sum of its proper divisors (48430309).

242151515 is an equidigital number, since it uses as much as digits as its factorization.

242151515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48430308.

The product of its digits is 2000, while the sum is 26.

The square root of 242151515 is about 15561.2183006344. The cubic root of 242151515 is about 623.2979954293.

The spelling of 242151515 in words is "two hundred forty-two million, one hundred fifty-one thousand, five hundred fifteen".