242140440431 has 2 divisors, whose sum is σ = 242140440432. Its totient is φ = 242140440430.

The previous prime is 242140440413. The next prime is 242140440461. The reversal of 242140440431 is 134044041242.

Together with previous prime (242140440413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242140440431 - 2²² = 242136246127 is a prime.

It is a super-2 number, since 2×242140440431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 242140440394 and 242140440403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242140440401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121070220215 + 121070220216.

It is an arithmetic number, because the mean of its divisors is an integer number (121070220216).

Almost surely, 2^242140440431 is an apocalyptic number.

242140440431 is a deficient number, since it is larger than the sum of its proper divisors (1).

242140440431 is an equidigital number, since it uses as much as digits as its factorization.

242140440431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 242140440431 its reverse (134044041242), we get a palindrome (376184481673).

The spelling of 242140440431 in words is "two hundred forty-two billion, one hundred forty million, four hundred forty thousand, four hundred thirty-one".