420340213331431 has 2 divisors, whose sum is σ = 420340213331432. Its totient is φ = 420340213331430.

The previous prime is 420340213331419. The next prime is 420340213331483. The reversal of 420340213331431 is 134133312043024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420340213331431 - 2⁷ = 420340213331303 is a prime.

It is a super-2 number, since 2×420340213331431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420340213331411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210170106665715 + 210170106665716.

It is an arithmetic number, because the mean of its divisors is an integer number (210170106665716).

Almost surely, 2^{420340213331431} is an apocalyptic number.

420340213331431 is a deficient number, since it is larger than the sum of its proper divisors (1).

420340213331431 is an equidigital number, since it uses as much as digits as its factorization.

420340213331431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 420340213331431 its reverse (134133312043024), we get a palindrome (554473525374455).

The spelling of 420340213331431 in words is "four hundred twenty trillion, three hundred forty billion, two hundred thirteen million, three hundred thirty-one thousand, four hundred thirty-one".