242515331 has 2 divisors, whose sum is σ = 242515332. Its totient is φ = 242515330.

The previous prime is 242515307. The next prime is 242515363. The reversal of 242515331 is 133515242.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242515331 - 2⁶ = 242515267 is a prime.

It is a super-2 number, since 2×242515331² = 117627371540079122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 242515331.

It is not a weakly prime, because it can be changed into another prime (242515391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121257665 + 121257666.

It is an arithmetic number, because the mean of its divisors is an integer number (121257666).

Almost surely, 2^242515331 is an apocalyptic number.

242515331 is a deficient number, since it is larger than the sum of its proper divisors (1).

242515331 is an equidigital number, since it uses as much as digits as its factorization.

242515331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 242515331 is about 15572.9037433614. The cubic root of 242515331 is about 623.6099933555.

The spelling of 242515331 in words is "two hundred forty-two million, five hundred fifteen thousand, three hundred thirty-one".