420220031 has 24 divisors (see below), whose sum is σ = 536649984. Its totient is φ = 325367280.

The previous prime is 420220001. The next prime is 420220043. The reversal of 420220031 is 130022024.

It is not a de Polignac number, because 420220031 - 2⁶ = 420219967 is a prime.

It is a super-2 number, since 2×420220031² = 353169748907281922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420219988 and 420220015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420220001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85466 + ... + 90248.

It is an arithmetic number, because the mean of its divisors is an integer number (22360416).

Almost surely, 2^420220031 is an apocalyptic number.

420220031 is a deficient number, since it is larger than the sum of its proper divisors (116429953).

420220031 is a wasteful number, since it uses less digits than its factorization.

420220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971 (or 4964 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 420220031 is about 20499.2690357486. The cubic root of 420220031 is about 749.0179924056.

Adding to 420220031 its reverse (130022024), we get a palindrome (550242055).

The spelling of 420220031 in words is "four hundred twenty million, two hundred twenty thousand, thirty-one".