401131161 has 24 divisors (see below), whose sum is σ = 603046080. Its totient is φ = 256625376.

The previous prime is 401131079. The next prime is 401131183. The reversal of 401131161 is 161131104.

It is not a de Polignac number, because 401131161 - 2¹⁵ = 401098393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (401131061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38986 + ... + 48188.

It is an arithmetic number, because the mean of its divisors is an integer number (25126920).

Almost surely, 2^401131161 is an apocalyptic number.

It is an amenable number.

401131161 is a deficient number, since it is larger than the sum of its proper divisors (201914919).

401131161 is a wasteful number, since it uses less digits than its factorization.

401131161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9405 (or 9402 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 401131161 is about 20028.2590606373. The cubic root of 401131161 is about 737.5001848511.

Adding to 401131161 its reverse (161131104), we get a palindrome (562262265).

The spelling of 401131161 in words is "four hundred one million, one hundred thirty-one thousand, one hundred sixty-one".