242220131 has 4 divisors (see below), whose sum is σ = 256468392. Its totient is φ = 227971872.

The previous prime is 242220109. The next prime is 242220137. The reversal of 242220131 is 131022242.

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

It is a cyclic number.

It is not a de Polignac number, because 242220131 - 2⁶ = 242220067 is a prime.

It is a super-2 number, since 2×242220131² = 117341183723314322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 14248243 = 242220131 / (2 + 4 + 2 + 2 + 2 + 0 + 1 + 3 + 1).

It is not an unprimeable number, because it can be changed into a prime (242220137) 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 3 ways as a sum of consecutive naturals, for example, 7124105 + ... + 7124138.

It is an arithmetic number, because the mean of its divisors is an integer number (64117098).

Almost surely, 2^242220131 is an apocalyptic number.

242220131 is a deficient number, since it is larger than the sum of its proper divisors (14248261).

242220131 is a wasteful number, since it uses less digits than its factorization.

242220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14248260.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 242220131 is about 15563.4228561715. The cubic root of 242220131 is about 623.3568623971.

Adding to 242220131 its reverse (131022242), we get a palindrome (373242373).

The spelling of 242220131 in words is "two hundred forty-two million, two hundred twenty thousand, one hundred thirty-one".