420040223431 has 2 divisors, whose sum is σ = 420040223432. Its totient is φ = 420040223430.

The previous prime is 420040223411. The next prime is 420040223441. The reversal of 420040223431 is 134322040024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420040223431 - 2¹⁵ = 420040190663 is a prime.

It is a super-2 number, since 2×420040223431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420040223396 and 420040223405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420040223411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210020111715 + 210020111716.

It is an arithmetic number, because the mean of its divisors is an integer number (210020111716).

Almost surely, 2^420040223431 is an apocalyptic number.

420040223431 is a deficient number, since it is larger than the sum of its proper divisors (1).

420040223431 is an equidigital number, since it uses as much as digits as its factorization.

420040223431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 420040223431 its reverse (134322040024), we get a palindrome (554362263455).

The spelling of 420040223431 in words is "four hundred twenty billion, forty million, two hundred twenty-three thousand, four hundred thirty-one".