242402431 has 2 divisors, whose sum is σ = 242402432. Its totient is φ = 242402430.

The previous prime is 242402383. The next prime is 242402441. The reversal of 242402431 is 134204242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242402431 - 2¹¹ = 242400383 is a prime.

It is a super-2 number, since 2×242402431² = 117517877109419522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242402441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121201215 + 121201216.

It is an arithmetic number, because the mean of its divisors is an integer number (121201216).

Almost surely, 2^242402431 is an apocalyptic number.

242402431 is a deficient number, since it is larger than the sum of its proper divisors (1).

242402431 is an equidigital number, since it uses as much as digits as its factorization.

242402431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 242402431 is about 15569.2784354317. The cubic root of 242402431 is about 623.5132070393.

Adding to 242402431 its reverse (134204242), we get a palindrome (376606673).

The spelling of 242402431 in words is "two hundred forty-two million, four hundred two thousand, four hundred thirty-one".