401403231 has 12 divisors (see below), whose sum is σ = 588459352. Its totient is φ = 263607696.

The previous prime is 401403217. The next prime is 401403263. The reversal of 401403231 is 132304104.

It is not a de Polignac number, because 401403231 - 2⁹ = 401402719 is a prime.

It is a super-2 number, since 2×401403231² = 322249107714478722, 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 (401403281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332236 + ... + 333441.

Almost surely, 2^401403231 is an apocalyptic number.

401403231 is a deficient number, since it is larger than the sum of its proper divisors (187056121).

401403231 is a wasteful number, since it uses less digits than its factorization.

401403231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665750 (or 665747 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 401403231 is about 20035.0500623283. The cubic root of 401403231 is about 737.6668853781. Note that the first 3 decimals are identical.

Adding to 401403231 its reverse (132304104), we get a palindrome (533707335).

The spelling of 401403231 in words is "four hundred one million, four hundred three thousand, two hundred thirty-one".