420240312331 has 16 divisors (see below), whose sum is σ = 481931200000. Its totient is φ = 358965105408.

The previous prime is 420240312301. The next prime is 420240312347. The reversal of 420240312331 is 133213042024.

It is not a de Polignac number, because 420240312331 - 2⁷ = 420240312203 is a prime.

It is a super-2 number, since 2×420240312331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420240312296 and 420240312305.

It is not an unprimeable number, because it can be changed into a prime (420240312301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3250186 + ... + 3377008.

It is an arithmetic number, because the mean of its divisors is an integer number (30120700000).

Almost surely, 2^420240312331 is an apocalyptic number.

420240312331 is a deficient number, since it is larger than the sum of its proper divisors (61690887669).

420240312331 is a wasteful number, since it uses less digits than its factorization.

420240312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128458.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 420240312331 its reverse (133213042024), we get a palindrome (553453354355).

The spelling of 420240312331 in words is "four hundred twenty billion, two hundred forty million, three hundred twelve thousand, three hundred thirty-one".