240423431 has 2 divisors, whose sum is σ = 240423432. Its totient is φ = 240423430.

The previous prime is 240423409. The next prime is 240423481. The reversal of 240423431 is 134324042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240423431 - 2²⁶ = 173314567 is a prime.

It is a super-2 number, since 2×240423431² = 115606852347623522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 240423397 and 240423406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240423481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120211715 + 120211716.

It is an arithmetic number, because the mean of its divisors is an integer number (120211716).

Almost surely, 2^240423431 is an apocalyptic number.

240423431 is a deficient number, since it is larger than the sum of its proper divisors (1).

240423431 is an equidigital number, since it uses as much as digits as its factorization.

240423431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 240423431 is about 15505.5935391071. The cubic root of 240423431 is about 621.8117582920.

Adding to 240423431 its reverse (134324042), we get a palindrome (374747473).

The spelling of 240423431 in words is "two hundred forty million, four hundred twenty-three thousand, four hundred thirty-one".