242215511 has 8 divisors (see below), whose sum is σ = 250776480. Its totient is φ = 233668512.

The previous prime is 242215483. The next prime is 242215513. The reversal of 242215511 is 115512242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242215511 is a prime.

It is a super-2 number, since 2×242215511² = 117336707537982242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242215513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42041 + ... + 47453.

It is an arithmetic number, because the mean of its divisors is an integer number (31347060).

Almost surely, 2^242215511 is an apocalyptic number.

242215511 is a deficient number, since it is larger than the sum of its proper divisors (8560969).

242215511 is a wasteful number, since it uses less digits than its factorization.

242215511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6985.

The product of its digits is 800, while the sum is 23.

The square root of 242215511 is about 15563.2744305304. The cubic root of 242215511 is about 623.3528991606.

Adding to 242215511 its reverse (115512242), we get a palindrome (357727753).

The spelling of 242215511 in words is "two hundred forty-two million, two hundred fifteen thousand, five hundred eleven".