242143191 has 18 divisors (see below), whose sum is σ = 358110168. Its totient is φ = 157663800.

The previous prime is 242143123. The next prime is 242143199. The reversal of 242143191 is 191341242.

It is a happy number.

It is not a de Polignac number, because 242143191 - 2¹³ = 242134999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242143199) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9366 + ... + 23916.

Almost surely, 2^242143191 is an apocalyptic number.

242143191 is a deficient number, since it is larger than the sum of its proper divisors (115966977).

242143191 is a wasteful number, since it uses less digits than its factorization.

242143191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14643 (or 14597 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 242143191 is about 15560.9508385574. The cubic root of 242143191 is about 623.2908533555.

The spelling of 242143191 in words is "two hundred forty-two million, one hundred forty-three thousand, one hundred ninety-one".