401323131 has 48 divisors (see below), whose sum is σ = 672403680. Its totient is φ = 227957760.

The previous prime is 401323051. The next prime is 401323193. The reversal of 401323131 is 131323104.

401323131 is a `hidden beast` number, since 401 + 3 + 231 + 31 = 666.

It is not a de Polignac number, because 401323131 - 2¹⁰ = 401322107 is a prime.

It is a super-2 number, since 2×401323131² = 322120510951286322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401323031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 654381 + ... + 654993.

It is an arithmetic number, because the mean of its divisors is an integer number (14008410).

Almost surely, 2^401323131 is an apocalyptic number.

401323131 is a deficient number, since it is larger than the sum of its proper divisors (271080549).

401323131 is a wasteful number, since it uses less digits than its factorization.

401323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 1033 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 401323131 is about 20033.0509658414. The cubic root of 401323131 is about 737.6178149807.

Adding to 401323131 its reverse (131323104), we get a palindrome (532646235).

The spelling of 401323131 in words is "four hundred one million, three hundred twenty-three thousand, one hundred thirty-one".