425435431 has 2 divisors, whose sum is σ = 425435432. Its totient is φ = 425435430.

The previous prime is 425435429. The next prime is 425435443. The reversal of 425435431 is 134534524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425435431 - 2¹ = 425435429 is a prime.

It is a super-2 number, since 2×425435431² = 361990611900311522, which contains 22 as substring.

Together with 425435429, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 425435393 and 425435402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425435471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212717715 + 212717716.

It is an arithmetic number, because the mean of its divisors is an integer number (212717716).

Almost surely, 2^425435431 is an apocalyptic number.

425435431 is a deficient number, since it is larger than the sum of its proper divisors (1).

425435431 is an equidigital number, since it uses as much as digits as its factorization.

425435431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 31.

The square root of 425435431 is about 20626.0861774598. The cubic root of 425435431 is about 752.1039772242.

Adding to 425435431 its reverse (134534524), we get a palindrome (559969955).

It can be divided in two parts, 42543 and 5431, that added together give a palindrome (47974).

The spelling of 425435431 in words is "four hundred twenty-five million, four hundred thirty-five thousand, four hundred thirty-one".