401205231 has 40 divisors (see below), whose sum is σ = 687125120. Its totient is φ = 228532752.

The previous prime is 401205223. The next prime is 401205271. The reversal of 401205231 is 132502104.

It is not a de Polignac number, because 401205231 - 2³ = 401205223 is a prime.

It is a super-2 number, since 2×401205231² = 321931274763526722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401205271) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 213960 + ... + 215826.

It is an arithmetic number, because the mean of its divisors is an integer number (17178128).

Almost surely, 2^401205231 is an apocalyptic number.

401205231 is a deficient number, since it is larger than the sum of its proper divisors (285919889).

401205231 is a wasteful number, since it uses less digits than its factorization.

401205231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265 (or 2256 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 401205231 is about 20030.1081125390. The cubic root of 401205231 is about 737.5455758869.

Adding to 401205231 its reverse (132502104), we get a palindrome (533707335).

The spelling of 401205231 in words is "four hundred one million, two hundred five thousand, two hundred thirty-one".