401138255 has 12 divisors (see below), whose sum is σ = 559956600. Its totient is φ = 275066064.

The previous prime is 401138251. The next prime is 401138261. The reversal of 401138255 is 552831104.

It is not a de Polignac number, because 401138255 - 2² = 401138251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401138251) 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 11 ways as a sum of consecutive naturals, for example, 818405 + ... + 818894.

It is an arithmetic number, because the mean of its divisors is an integer number (46663050).

Almost surely, 2^401138255 is an apocalyptic number.

401138255 is a deficient number, since it is larger than the sum of its proper divisors (158818345).

401138255 is a wasteful number, since it uses less digits than its factorization.

401138255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637318 (or 1637311 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 401138255 is about 20028.4361596207. The cubic root of 401138255 is about 737.5045323862.

Adding to 401138255 its reverse (552831104), we get a palindrome (953969359).

The spelling of 401138255 in words is "four hundred one million, one hundred thirty-eight thousand, two hundred fifty-five".