420020131 has 2 divisors, whose sum is σ = 420020132. Its totient is φ = 420020130.

The previous prime is 420020077. The next prime is 420020149. The reversal of 420020131 is 131020024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420020131 - 2¹³ = 420011939 is a prime.

It is a super-2 number, since 2×420020131² = 352833820890514322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420020171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210010065 + 210010066.

It is an arithmetic number, because the mean of its divisors is an integer number (210010066).

Almost surely, 2^420020131 is an apocalyptic number.

420020131 is a deficient number, since it is larger than the sum of its proper divisors (1).

420020131 is an equidigital number, since it uses as much as digits as its factorization.

420020131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 420020131 is about 20494.3926721433. The cubic root of 420020131 is about 748.8992034902.

Adding to 420020131 its reverse (131020024), we get a palindrome (551040155).

The spelling of 420020131 in words is "four hundred twenty million, twenty thousand, one hundred thirty-one".