242231861 has 16 divisors (see below), whose sum is σ = 265628160. Its totient is φ = 219901440.

The previous prime is 242231851. The next prime is 242231863. The reversal of 242231861 is 168132242.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 242231861 - 2¹⁰ = 242230837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242231863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220265 + ... + 221361.

It is an arithmetic number, because the mean of its divisors is an integer number (16601760).

Almost surely, 2^242231861 is an apocalyptic number.

It is an amenable number.

242231861 is a deficient number, since it is larger than the sum of its proper divisors (23396299).

242231861 is a wasteful number, since it uses less digits than its factorization.

242231861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564.

The product of its digits is 4608, while the sum is 29.

The square root of 242231861 is about 15563.7996967322. The cubic root of 242231861 is about 623.3669246738.

The spelling of 242231861 in words is "two hundred forty-two million, two hundred thirty-one thousand, eight hundred sixty-one".