242133431 has 4 divisors (see below), whose sum is σ = 256376592. Its totient is φ = 227890272.

The previous prime is 242133421. The next prime is 242133487. The reversal of 242133431 is 134331242.

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 242133431 - 2²² = 237939127 is a prime.

It is a super-4 number, since 4×242133431⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 242133397 and 242133406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242133401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7121555 + ... + 7121588.

It is an arithmetic number, because the mean of its divisors is an integer number (64094148).

Almost surely, 2^242133431 is an apocalyptic number.

242133431 is a deficient number, since it is larger than the sum of its proper divisors (14243161).

242133431 is a wasteful number, since it uses less digits than its factorization.

242133431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14243160.

The product of its digits is 1728, while the sum is 23.

The square root of 242133431 is about 15560.6372298823. The cubic root of 242133431 is about 623.2824789712.

Adding to 242133431 its reverse (134331242), we get a palindrome (376464673).

The spelling of 242133431 in words is "two hundred forty-two million, one hundred thirty-three thousand, four hundred thirty-one".