420323131 has 2 divisors, whose sum is σ = 420323132. Its totient is φ = 420323130.

The previous prime is 420323119. The next prime is 420323143. The reversal of 420323131 is 131323024.

It is a balanced prime because it is at equal distance from previous prime (420323119) and next prime (420323143).

It is a cyclic number.

It is not a de Polignac number, because 420323131 - 2⁷ = 420323003 is a prime.

It is a super-2 number, since 2×420323131² = 353343068907286322, 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 = 420323099 and 420323108.

It is not a weakly prime, because it can be changed into another prime (420323191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210161565 + 210161566.

It is an arithmetic number, because the mean of its divisors is an integer number (210161566).

Almost surely, 2^420323131 is an apocalyptic number.

420323131 is a deficient number, since it is larger than the sum of its proper divisors (1).

420323131 is an equidigital number, since it uses as much as digits as its factorization.

420323131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 420323131 is about 20501.7836053354. The cubic root of 420323131 is about 749.0792439997.

Adding to 420323131 its reverse (131323024), we get a palindrome (551646155).

The spelling of 420323131 in words is "four hundred twenty million, three hundred twenty-three thousand, one hundred thirty-one".