401331641 has 8 divisors (see below), whose sum is σ = 406007424. Its totient is φ = 396673200.

The previous prime is 401331607. The next prime is 401331647. The reversal of 401331641 is 146133104.

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

It is a cyclic number.

It is not a de Polignac number, because 401331641 - 2²² = 397137337 is a prime.

It is a super-2 number, since 2×401331641² = 322134172135505762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401331647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45491 + ... + 53591.

It is an arithmetic number, because the mean of its divisors is an integer number (50750928).

Almost surely, 2^401331641 is an apocalyptic number.

It is an amenable number.

401331641 is a deficient number, since it is larger than the sum of its proper divisors (4675783).

401331641 is a wasteful number, since it uses less digits than its factorization.

401331641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8671.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 401331641 is about 20033.2633637159. The cubic root of 401331641 is about 737.6230286375.

Adding to 401331641 its reverse (146133104), we get a palindrome (547464745).

The spelling of 401331641 in words is "four hundred one million, three hundred thirty-one thousand, six hundred forty-one".