420011331 has 4 divisors (see below), whose sum is σ = 560015112. Its totient is φ = 280007552.

The previous prime is 420011329. The next prime is 420011341. The reversal of 420011331 is 133110024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420011331 - 2¹ = 420011329 is a prime.

It is a super-3 number, since 3×420011331³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 420011331.

It is not an unprimeable number, because it can be changed into a prime (420011341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70001886 + ... + 70001891.

It is an arithmetic number, because the mean of its divisors is an integer number (140003778).

Almost surely, 2^420011331 is an apocalyptic number.

420011331 is a deficient number, since it is larger than the sum of its proper divisors (140003781).

420011331 is a wasteful number, since it uses less digits than its factorization.

420011331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140003780.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 420011331 is about 20494.1779781478. The cubic root of 420011331 is about 748.8939732972.

Adding to 420011331 its reverse (133110024), we get a palindrome (553121355).

The spelling of 420011331 in words is "four hundred twenty million, eleven thousand, three hundred thirty-one".