242405431 has 16 divisors (see below), whose sum is σ = 261714240. Its totient is φ = 223695360.

The previous prime is 242405419. The next prime is 242405447. The reversal of 242405431 is 134504242.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 242405431 - 2⁹ = 242404919 is a prime.

It is a super-2 number, since 2×242405431² = 117520785956591522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242405396 and 242405405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242405131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275965 + ... + 276841.

It is an arithmetic number, because the mean of its divisors is an integer number (16357140).

Almost surely, 2^242405431 is an apocalyptic number.

242405431 is a deficient number, since it is larger than the sum of its proper divisors (19308809).

242405431 is a wasteful number, since it uses less digits than its factorization.

242405431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 242405431 is about 15569.3747787122. The cubic root of 242405431 is about 623.5157792521.

Adding to 242405431 its reverse (134504242), we get a palindrome (376909673).

The spelling of 242405431 in words is "two hundred forty-two million, four hundred five thousand, four hundred thirty-one".