401231031185 has 8 divisors (see below), whose sum is σ = 481505534376. Its totient is φ = 320965960320.

The previous prime is 401231031161. The next prime is 401231031193. The reversal of 401231031185 is 581130132104.

It is a Cunningham number, because it is equal to 633428²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 401231031184 = 1^2 + 633428^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401231031185 - 2¹² = 401231027089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2264156 + ... + 2434925.

It is an arithmetic number, because the mean of its divisors is an integer number (60188191797).

Almost surely, 2^401231031185 is an apocalyptic number.

It is an amenable number.

401231031185 is a deficient number, since it is larger than the sum of its proper divisors (80274503191).

401231031185 is a wasteful number, since it uses less digits than its factorization.

401231031185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716163.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 401231031185 its reverse (581130132104), we get a palindrome (982361163289).

The spelling of 401231031185 in words is "four hundred one billion, two hundred thirty-one million, thirty-one thousand, one hundred eighty-five".