242640022 has 4 divisors (see below), whose sum is σ = 363960036. Its totient is φ = 121320010.

The previous prime is 242640019. The next prime is 242640059. The reversal of 242640022 is 220046242.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 242639975 and 242640002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660004 + ... + 60660007.

It is an arithmetic number, because the mean of its divisors is an integer number (90990009).

Almost surely, 2^242640022 is an apocalyptic number.

242640022 is a deficient number, since it is larger than the sum of its proper divisors (121320014).

242640022 is a wasteful number, since it uses less digits than its factorization.

242640022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121320013.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 242640022 is about 15576.9066890702. The cubic root of 242640022 is about 623.7168528964.

Adding to 242640022 its reverse (220046242), we get a palindrome (462686264).

The spelling of 242640022 in words is "two hundred forty-two million, six hundred forty thousand, twenty-two".