401205331 has 4 divisors (see below), whose sum is σ = 401487912. Its totient is φ = 400922752.

The previous prime is 401205323. The next prime is 401205341. The reversal of 401205331 is 133502104.

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 401205331 - 2³ = 401205323 is a prime.

It is a super-2 number, since 2×401205331² = 321931435245639122, 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 = 401205299 and 401205308.

It is not an unprimeable number, because it can be changed into a prime (401205341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139150 + ... + 142003.

It is an arithmetic number, because the mean of its divisors is an integer number (100371978).

Almost surely, 2^401205331 is an apocalyptic number.

401205331 is a deficient number, since it is larger than the sum of its proper divisors (282581).

401205331 is a wasteful number, since it uses less digits than its factorization.

401205331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282580.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 401205331 is about 20030.1106087810. The cubic root of 401205331 is about 737.5456371644.

Adding to 401205331 its reverse (133502104), we get a palindrome (534707435).

It can be divided in two parts, 40120 and 5331, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 401205331 in words is "four hundred one million, two hundred five thousand, three hundred thirty-one".