242502209 has 4 divisors (see below), whose sum is σ = 242570160. Its totient is φ = 242434260.

The previous prime is 242502199. The next prime is 242502233. The reversal of 242502209 is 902205242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 902205242 = 2 ⋅451102621.

It is a cyclic number.

It is not a de Polignac number, because 242502209 - 2⁸ = 242501953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242502809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28307 + ... + 35864.

It is an arithmetic number, because the mean of its divisors is an integer number (60642540).

Almost surely, 2^242502209 is an apocalyptic number.

It is an amenable number.

242502209 is a deficient number, since it is larger than the sum of its proper divisors (67951).

242502209 is an equidigital number, since it uses as much as digits as its factorization.

242502209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67950.

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

The square root of 242502209 is about 15572.4824289514. The cubic root of 242502209 is about 623.5987457396.

The spelling of 242502209 in words is "two hundred forty-two million, five hundred two thousand, two hundred nine".