420422131 has 2 divisors, whose sum is σ = 420422132. Its totient is φ = 420422130.

The previous prime is 420422117. The next prime is 420422173. The reversal of 420422131 is 131224024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420422131 - 2¹¹ = 420420083 is a prime.

It is a super-2 number, since 2×420422131² = 353509536469162322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420422099 and 420422108.

It is not a weakly prime, because it can be changed into another prime (429422131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210211065 + 210211066.

It is an arithmetic number, because the mean of its divisors is an integer number (210211066).

Almost surely, 2^420422131 is an apocalyptic number.

420422131 is a deficient number, since it is larger than the sum of its proper divisors (1).

420422131 is an equidigital number, since it uses as much as digits as its factorization.

420422131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 420422131 is about 20504.1978872620. The cubic root of 420422131 is about 749.1380503625.

Adding to 420422131 its reverse (131224024), we get a palindrome (551646155).

It can be divided in two parts, 4204 and 22131, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 420422131 in words is "four hundred twenty million, four hundred twenty-two thousand, one hundred thirty-one".